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Te/eVideo® Model925 and User's Guide

1. TeleVideo Model 925 CRT Terminal Installation and User s Guide 9 TeleVideo Systems Inc Vital Statistics When you receive your terminal enter here the serial number on rear panel date received and switch settings This will expedite any technical conversations about your terminal Serial Number _ Date Received Switch Settings Used U D U D U D Enter U or D for Up or Down S1 SERNER S2 1 S3 1 Zos 7 Dn JS aza ja J RKI dn 4 4 S in use Jan G2 6 6 a osaa Fas 8 a On 9 J 9 10 10__ 10__ Disclaimer TeleVideo Systems Inc makes no representations or warranties with respect to this manual Further Tele Video Systems Inc reserves the right to make changes in the specifications of the product described within this manual at any time without notice and without obligation of TeleVideo Systems Inc to notify any person of such revision or changes TELEVIDEO SYSTEMS INC 1170 Morse Avenue Sunnyvale California 94086 408 745 7760 Warning This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause interference to radio communications As temporarily permitted by regulation it has not been tested for compliance with the limits for Class A computing devices pursuant to Subpart J of Part 15 of FCC Rules which are designed to provide reasonable protection against su
2. Printer Port E15 Keyboard Switch E6 Connector Generator Connector E16 Connector witch S2 ES RS232C RS232C P2 Pin 6 Composite Video Monitor Connector E1 E2 Speaker 5 ent ey reer i IO i if e i E4 Goseentaeel Page 1 Display RAM System Gate Array LLRKKNAKKAIXIKEIKKKKAXANE CPU System ROM CRT Controller Optional Page 2 Display RAM A33 Figure 2 4b Logic Board Part No 002 2 4 4 1 Character Sets The 925 has four possible character sets controlled by S3 The standard set is English To select another char acter set refer to Table 2 4 lt 1 Character sets are resident in the character generator You must reprogram the terminal system ROM for the particular keyboard layout desired 2 4 4 2 Video Display You can set the display of the terminal to be green on black or black on green with a steady or blinking cursor which is either an underline or a block 2 4 5 Composite Video Jumper Option To drive a monitor in addition to the terminal monitor you can modify the 925 logic board The logic board s part number may be labeled 001 Figure 2 4a or 002 Figure 2 4b The modification instructions for the com posite video jumper are the same regardless of the logic board designation The modifications needed are as follows 1 Add a BNC connector to the back panel 2 Connect the center lead to P2 pin 6 connect the ground lead of the BNC connector to P2 pin 3 3 Cut t
3. The acronym for American Standard Code for Infor mation Interchange This is a standardized code for the transmission of data within the United States It is com posed of 128 characters upper and lowercase letters numerals punctuation marks symbols and control characters in a 7 bit binary format Asynchronous Communication A method of communication where the time synchroni zation of the transmission of data between the sending and receiving stations is set by start and stop bits and the baud rate Baud The rate of transmission of data One baud equals one binary bit per second Bit An abbreviation for binary digit A bit is the smallest unit of data ASCII codes are composed of seven bits BREAK To break or interrupt communications When the BREAK switch on the terminal is toggled a 250 milli second tone is sent to the computer to immediately halt communications Buffer An electronic device within the terminal that allows for the temporary storage of incoming data should the trans mission rate of the incoming data be faster than the ter minal s printing speed Bug An error in a computer program or in the operation of the computer Byte A coded group of binary bits which represents a char acter letter numeral symbol command etc Code A method of representing data by groups of binary digits Command A code that will cause the terminal or computer to per form an electronic or mech
4. The only field that cannot be changed during setup mode is the first field which is the time of day 12 BLANK PRINTER BAUD RATE 50 75 110 135 150 300 600 1200 1800 2400 3600 4800 7200 9600 19 2K MODE HDX FDX BLK MAIN PORT BAUD RATE 50 75 110 135 150 300 600 1200 1800 2400 3600 4800 7200 9600 19 2K KLOK or BLANK KEYBOARD LOCK 920 E 920 EMULATION MONT or BLANK MONITOR MODE LOCE DUPE LOCAL EDIT DUPLEX EDIT TIME AMorPM HOURS MINUTES 3 4 2 Editing Should you need to change text on the screen you can delete a line either partially or completely or the whole display either partially or completely This will give you space to enter the correct data Deletions will start with the column position under the cursor The com mands for editing are found in Chapter 4 The 925 in addition to the above can modify screen data using char acter insert delete and line insert delete Both of these take place starting at the cursor position 3 4 3 Tab Controls You can set regular typewriter style tabs on your termi nal Pressing the TAB key causes the cursor to stop whenever it reaches that column position regardless of which line the cursor was on when the tab was set Char acters can be superimposed on the tab position pag ta musaan tha wey CK t t i sagen cotta KUTI vail Figure 3 2 Model 925 Screen Display 13 3 4 4 Emulations Th
5. 2 2 4 Reporting Damage If hidden damage is found immediately notify the trans fer company of the damage Save all packing materials for the transfer company s inspection file a damage re port with the carrier and notify your dealer and TeleVideo of the damage Since terms of sale for the terminal are FOB TeleVideo Sunnyvale California Tele Video is not responsible for any damage which oc curred during shipment and will not repair this damage under warranty All repairs for shipping damage are bill able Prompt notification of damage will ensure claim validity and expedite payment for necessary repairs by the transfer company or its insurance agent 2 2 5 Reshipping the Terminal Should you need to reship the terminal follow these procedures 1 Remove the two screws on the bottom front and bottom rear of the terminal and lift off the cover 2 Check the integrity of the cabling and security of internal mounting hardware 3 Replace cover being careful not to overtighten the SCrews 4 Repack the terminal in the original Tele Video ship ping container or other suitable materials 5 Put the RMA number on the outside of the box 2 3 PREPARING THE SITE Before you proceed with the actual installation make sure you are ready with the proper power and a large enough table 2 3 1 Power Requirements 115 VAC 60 Hertz at 0 5 amp OR 230 VAC 50 Hertz at 0 25 amp e 55 watts e NEMA standard 5 15R 3 prong recepta
6. Rear Panel Controls Fig 2 2 3 2 1 Repair 6 2 Reshipping 2 2 5 Return Key T3 1 Return Materials Authorization RMA front 31 Safety Precautions 1 4 Screen Attributes 4 6 Screen Time Out 4 18 Self Test 6 1 1 Send Function 4 10 Send Key T3 1 Serial Number front Service front Set up No Scroll Key T3 1 Set up procedure 3 4 1 Shift key T3 1 Site preparation 2 3 Space Bar T3 1 Specifications Status Line 3 4 1 Switch Settings record of front Tab Key T3 1 Tab Controls 3 4 3 Tab Programming 4 7 Technical assistance front Terminating Character 4 11 Test Self 6 1 1 Time of Day Clock 4 12 6 4 15 Transmission Modes 3 4 5 Transmission Block 3 4 5 2 Transmission Conversation 3 4 5 1 Transmission Full Duplex 3 4 5 1 2 Transmission Half Duplex 3 4 5 1 1 Transparent Print 4 12 Troubleshooting 6 1 Turning on Terminal 3 2 Two page Memory Option 2 4 6 Typewriter Tabs 4 7 2 1 User Line 4 20 Ventilation Requirements 2 3 2 Video Attributes 4 6 Video Display 2 4 4 2 X on X off Control 4 13 Warranty limited iti Write Protect Mode 4 8 3 1 MODEL 925 OPERATOR S QUICK REFERENCE GUIDE FUNCTION 912C 920C 925 Bell CTRL G CTRL G Cursor Left CTRL H CTRI H Cursor Right CTRL L CTRL L Cursor Down CTRL J CTRL V Cursor Up CTRL K CTRL K Cursor Home CTRL A CTRL A Address Cursor Page Row Column ESC PRC ESC PRC Address Cursor Row Colum
7. Set the power select switch on the bottom of the terminal to either 115V or 230V You will set Hertz to match your power frequency when you set 2 2 4 2 Connecting the Terminal to Your Computer System You can connect the terminal directly to your computer system or use a modem Table 2 1 points out pin connec tions which are always used for either the computer con nection or to a modem Interfacing Connections The interface connection to the computer system main port is P3 located on the rear of the terminal The connector configuration of P3 is given in Table 2 1 TABLE 2 1 P3 COMPUTER INTERFACE CONNECTOR PIN No SIGNAL NAME Frame Ground Transmit Data Output Receive Data Input Reguest To Send Output Clear To Send Input Data Set Ready Input opt Signal Ground Carrier Detect Input Data Terminal Ready Output 20 mA source 12V no load 20 mA source 12V no load Detected current loop data Current Loop Transmit Current Loop Transmit Current Loop Receive Current Loop Receive 1 2 3 4 5 6 7 8 20 9 W 4 e PI e ja mN On O A Reference EIA Standard RS232 for Signal Definitions TABLE 2 2 TABLE 2 3 SERIAL PRINTER INTERFACE P4 EXTERNAL SWITCH SETTINGS FOR PIN CONNECTIONS MODEL 925 Baud Rate SIGNAL NAME Switch Position Setting S1 7 8 9 10 Printer 1 Protect Ground 1 2 3 4 Main RS232 2 Receive Data z D 4 3 Transmit Data D D U D 75 4 Request
8. called the parity bit is added to the end of each ASCII character to make the final count of 1 bits in the character an even or odd number according to a prearranged format Some sys tems always use even parity some always use odd parity and some do not check for parity Both terminal and sys tem must be set for the same parity Protocol All of the conventions which must be observed in order for the computer and terminal to communicate with each other Serial Communication The standard method of ASCII character transmission where bits are sent one at a time in sequence Each 7 bit ASCII character is preceded by a start bit see Asyn chronous Communication and ended with a parity bit and stop bit Toggle Activation or deactivation of function or mode key either a receive key command sequence or manual keystroke 29 Wraparound Movement of the cursor as it reaches the right edge of screen disappears and wraps around to the begin ning of the next line X ON X OFF A handshaking protocol When the terminal s buffer is nearly full it transmits an X OFF to the computer to stop transmission when the buffer is almost empty an X ON is transmitted to the host to resume transmission ASCII CODE CHART 7 n n n n 4 4 4 4 i v v v V H i i H 5 gt 0 1 0 1 0 1 0 1 Bits ee a ee ee a ee ee pofofolo o mm oe s o e er fe ACK reefer ope pe oon n SENERE NEW LINE
9. ASCII Code Table Abbreviations For Control Characters NUL null FF form feed CAN cancel SOH start of heading CR carriage return EM end of medium STX start of text SO shift out SUB substitute ETX end of text SI shift in ESC escape EOT end of transmission DLE data link escape FS file separator ENO enguiry DC1 device control 1 GS group separator ACK acknowledge DC2 device control 2 RS record separator BEL bell DC3 device control 3 US unit separator BS backspace DC4 device control 4 SP space HT horizontal tabulation NAK negative acknowledge DEL delete LF linefeed SYN synchronous idle VT vertical tabulation ETB end of transmission block 30 Addressing Cursor 4 5 1 Alpha Lock T3 1 Attributes Cursor 4 22 Attributes Video 4 6 Audible Functions 3 3 3 3 Backspace T3 1 Backtab T3 1 4 7 2 3 Bell 3 3 3 3 Biderect Port 4 12 5 Block Model 3 4 5 2 Break T 3 1 3 3 3 4 Buffer see Transparent Print Care 5 1 Carriage Return T3 1 Char Del Key T3 1 Char Insert Key T3 1 Character Sets 2 4 4 1 Cleaning 5 1 1 Clear Functions 4 9 2 4 Clear Space T3 1 Composite Video Jumper Options 2 4 5 Connecting terminal to computer 2 4 2 Conversation Mode 3 4 5 1 Copy extension Print 4 12 4 CTRL T 31 Cursor Addressing 3 3 3 2 4 5 Cursor Attributes 4 22 Cursor Control 3 3 3 1 4 9 2 Cursor Control Codes 4 9 2 1 Cursor Down T3 1 Cursor Home T3 1 Cursor Left T3 1 Cursor Reading 4 5 Cursor Right T3 1 Cursor Up T3 1 DEL delet
10. Make sure upper and lower case codes are used Is a numeral one required instead of lowercase L Put in lower case Disconnect computer system Connect P3 2 to P3 3 and try in full duplex Set correct baud rate Check handshaking protocol requirements of system with terminal protocol Replace modem Check phone lines Install dedicated phone lines Check operating environment for static Separate cables Keep EIA cable separate from power cord to prevent noise on data line TABLE 6 1 Continued TROUBLESHOOTING TERMINAL PROBLEMS Symptom Possible Cause Terminal prints garbage Erroneous data sent to computer Scrambled output Terminal loses memory AC outlet not wired properly Terminal does not print what is typed while on line Terminal only prints characters Parity switch set incorrectly Stop bits set incorrectly AC outlet not wired properly Static electricity Duplex switch incorrectly set Word length switch set incorrectly Solution Check for proper wiring and grounding 1 Check operating environment for static problems 2 Install antistatic floor mat 3 Spray carpeting with antistatic spray 4 Increase humidity Check for proper wiring and grounding Set duplex switch to match host system Set word length switch to match computer system Set parity switch to match computer system Set stop bit switch to match computer system GLOSSARY ASCII
11. Repair 6 2 1 Changing the Line Fuse 6 2 2 Changing the Power Supply Fuses TROUBLE SHOOTING CHART GLOSSARY US ASCII CHART 5 1 Disable Bidirectional Port CTRL T 16 17 17 17 17 17 17 18 18 18 18 18 18 18 18 18 19 19 19 19 20 20 20 20 20 20 21 21 21 21 21 21 21 21 21 4 Extension Copy Print Mode Off ESC A 21 21 22 22 22 22 22 22 22 22 23 23 23 23 23 23 23 23 23 23 23 23 24 24 24 24 24 24 25 27 29 LIMITED WARRANTY AND RETURNED MATERIAL PROCEDURE STATEMENT OF LIMITED WARRANTY TeleVideo Systems Inc TeleVideo warrants to Buyer that products except software manufactured by TeleVideo will be free from defects in material and workmanship TeleVideo s obligations under this warranty will be limited to repairing or replacing at TeleVideo s option the part or parts of the products which prove defective in material or workmanship within 90 days after shipment by TeleVideo provided that Buyer gives TeleVideo prompt notice of any defect and satisfactory proof thereof Products may be returned by Buyer only after a Return Material Authorization number RMA has been obtained from TeleVideo by telephone or in writing Buyer will prepay all freight charges to return any products to the repair facility designated by TeleVideo and include the RMA number on the shipping container TeleVideo will deliver replacements for defective products or parts on an exchange
12. Steady Underline 6 X Time out blank ON X Time out blank OFF 7 X Page Attributes X Line Attributes 8 X DCD Disconnected X DCD Connected 9 X DSR Disconnected X DSR Connected 10 X DTR Disconnected X DTR Connected 2 4 3 Interfacing to a Printer Your terminal can be connected to an auxiliary serial printer to make a permanent hard copy of data displayed on the screen The terminal s serial printer interface al lows the terminal to be used with most RS232 compati ble serial printers currently available on the market including both character by character and buffered printers The serial printer interface is a 25 pin connec tor P4 located on the rear of the terminal Table 2 2 defines the printer interface pin connections S1 and S2 are accessible from the rear of the terminal S3 internal switch is only accessible by removing the four cabinet screws see 2 2 3 and removing the cover 2 4 4 Configuring the Terminal for the Computer and Printer Several switches located at the rear and internally see Figure 2 2 allow you to configure the terminal to op erate according to the requirements of your computer system and printer This section lists all possible switch settings in table form vie on Whenever you change any switches reset the terminal by turning the power off and then back on or pressing SHIFT BREAK BREAK keys to allow the software to scan all of the new switch positions Setting the switches as sho
13. To Send D D U U 110 5 Clear To Send D U D D 135 6 Data Set Ready D U D U 150 7 Signal Ground D U U D 300 8 Data Carrier Detect D U U U 600 20 Data Terminal Ready U D D D 1200 U D D U 1800 U D U D 2400 U D U U 3600 U U D D 4800 U U D U 7200 U U U D 9600 U U U U 19200 Legend U Up D Down NOTES 1 Set to match powerline freguency to avoid screen flicker Toggle Setting Switch Position Up Down Description SI 5 X 7 bit word X 8 bit word 6 X 2 stop bits X 1stopbit S2 1 X Local Edit Figure 2 1 Model 925 Dimensions X Duplex Edit transmit editing keys 2 X 912 920 emulation X 925 3 X 4 X Noparity 5 X 3 X 4 X Odd Parity 5 X 3 X 4 X Even Parity 5 X 3 X Contrast Serial Fuse 115 230V Power 4 X Mark Parity Switch Number Switch Switch 5 X 3 X 4 X Space Parity 5 X Figure 2 2 925 Rear Panel Toggle Setting Switch Position Up Down Description S2 6 X White on Black X Black on White 7 X 8 x Half Duplex 7 X Full Duplex 8 X 7 ja Block Mode 8 X 9 x 50 Hz X 60 Hz 10 X CR LF Auto LF X CRonly TABLE 2 4 S3 INTERNAL SWITCH SETTINGS Dipswitch Position Number UP DN Description 1 X Keyclick Off X Keyclick On 2 X English 5 X English 2 X German 3 X German 2 X French 3 X French 2 X Spanish 3 X Spanish 4 X Blinking Block Cursor 5 X Blinking Block Cursor 4 X Blinking Underline Cursor 5 X Blinking Underline Cursor 4 X Steady Block Cursor 5 X Steady Block Cursor 4 X Steady Underline 5 X
14. To renew the extended warranty for another year the same procedure must be followed Shipping charges are not included in the Extended Warranty This is the only expense you incur lil SPECIFICATIONS MONITOR Size 12 inches measured diagonally Phosphor P31 nonglare green screen DISPLAYED CHARACTER SET 128 displayable characters 96 character ASCII upper lower case alphabet with true descenders plus 32 control characters 24 lines 80 characters per line 25th Status Line 1920 characters per screen VIDEO ATTRIBUTES Blinking fields Security blank fields Reverse video Underlined fields Half intensity CHARACTER SETS English French German Spanish EMULATIONS TeleVideo 912 920 terminals CHARACTER FONT TX8 dot matrix 8X10 resolution CURSOR CONTROL t 4 lt gt Home Tab Back Tab Return Line Feed Backspace EDITING Line insert delete Character insert delete Line scroll No Scroll REPEAT 20 cps auto repeat PARITY Even Odd Mark Space or No Parity TRANSMISSION Conversation mode Full or half duplex keyboard selectable Block mode BAUD RATE 15 baud rates 50 75 110 135 150 300 600 1200 1800 2400 3600 4800 7200 9600 19 200 WORD STRUCTURE 7 or 8 data bits One or 2 stop bits 10 11 bit word INTERFACES Standard RS232C point to point 20ma current loop optional RS232C printer port bidirectional AUXILLIARY PORT Printer RS232C bidirectional page
15. VAC Configuration 2 4 1 3 Setting Power Select Switch 2 4 2 Connecting the Terminal to Your Computer System 2 4 3 Interfacing to a Printer 2 4 4 Configuring the Terminal for the Computer and Printer 2 4 4 1 Character Sets 2 4 4 2 Video Display 2 4 5 Composite Video Jumper Option 2 4 6 Two Page Memory Option 2 4 7 Additional Field Modifications 2 5 Checking Your Installation 3 OPERATION 3 1 Introduction 3 2 Turning On the Terminal 1 Rear Controls 2 Turning On the Terminal Keybaord Controls 1 Keyboard Layout 2 Other Controls 2 1 Cursor 2 2 Cursor Addressing 2 3 Bell 2 4 Break asic Operations 925 Status Line and Setup Mode Editing Tab Controls Emulations Transmission Modes 1 Conversation Mode 1 1 Half Duplex Mode 1 2 Full Duplex Mode 2 Block Mode 6 Sending Data to the Printer 4 PROGRAMMING 4 1 Introduction 4 2 Monitor Mode 4 3 Function Keys 4 4 FUNCT Function Key 4 5 Addressing and Reading the Cursor 4 5 1 Addressing the Cursor 4 5 2 Reading the Cursor B 1 2 3 4 5 3s A S 5 WWWW WWW I I I II I WWV IWW PRED DAD ARR RROWHWHWWHKN TABLE OF CONTENTS iii NO p p pd pee WWWOWWWWNNNMN NN YN WM Go AAAA joa m tet SPI SEN ON DN jossa j bueh pmd pueb pad pd pd pad peb pb pd pd eee AMAnnhb Ph ALKLRLLLA PO Db Io li 4 6 Video Attributes 4 7 Tabs 4 7 1 Setting Tabs ESC 1 4 7 2 Using Tabs 4 7 2 1 Typewriter Tab Protect and Unprotect CTRL I 4 7 2 2 Field T
16. basis to Buyer freight prepaid to the Buyer Products returned to TeleVideo under this warranty will become the property of TeleVideo With respect to any product or part thereof not manufactured by TeleVideo only the warranty if any given by the manufac turer thereof will apply EXCLUSIONS This limited warranty does not cover losses or damage which occurs in shipment to or from Buyer or is due to 1 improper installation or maintenance misuse neglect or any cause other than ordinary commercial or industrial application or 2 adjustment repair or modifications by other than by TeleVideo authorized personnel or 3 improper environment excessive or inadequate heating or air conditioning and electrical power failures surges or other irregu larities or 4 any statements made about TeleVideo s products by salesmen dealers distributors or agents unless confirmed in writing by a TeleVideo officer THE FOREGOING TELEVIDEO LIMITED WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES WHETHER ORAL WRITTEN EXPRESS IMPLIED OR STATUTORY IMPLIED WARRANTIES OF MER CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE WILL NOT APPLY TELEVIDEO S WAR RANTY OBLIGATIONS AND BUYER S REMEDIES HEREUNDER ARE SOLELY AND EXCLUSIVELY AS STATED HEREIN TELEVIDEO MAKES NO WARRANTY WHATSOEVER CONCERNING ANY SOFT WARE PRODUCTS WHICH ARE SOLD AS IS AND WITH ALL FAULTS TELEVIDEO S LIABILITY WHETHER BASED ON CONTRACT TORT WARRANTY STRICT LIABIL
17. modem phone lines and computer system Set to full duplex and perform self test Set to half duplex Enter ESC Review Chapter 2 switch settings carefully and check all switch settings TABLE 6 1 Continued TROUBLESHOOTING TERMINAL PROBLEMS Symptom Possible Cause Solution Terminal prints correct data only Parity settings incorrect Check parity settings with system part of the time reguirements Stop bits or word structure wrong Change switch settings Display is wavy Hertz setting incorrect does not Change switch setting match local power freguency Printer does not print what is transmitted Correct print mode selected Cable connector pins connected incorrectly Escape and control codes do not function as specified The escape and or control codes being used are not correct Keyboard locked in SHIFT position AUTO LOCK on Terminal prints garbage Improper baud rate setting Improper handshaking protocol Defective modem Noisy telephone lines Static electricity EIA and AC power cords intermingled 26 Refer to 4 12 1 and 4 12 2 Refer to Table 2 2 Check printer port P4 interface cable connector pins e 4 or 20 must be driven by 12 VDC or not connected at all for normal operation 3 must be connected to printer data input Check other printer port device requirements Check model number of terminal and code table for correct model of terminal being used
18. not respond while on line Terminal is not responding to settings Terminal locked up Terminal locked up Possible Cause No AC power System is not up Loose unconnected or damaged cables Modem not turned on defective or phone handset on modem upside down Defective contrast pot Contrast set too light Incorrect parity switch setting word structure stop bits Terminal not powered down after being reconfigured software has not scanned new settings System is not responding communication link broken Terminal incorrectly set for on line and full duplex Keyboard disabled from computer Switches set incorrectly 25 Solution Plug in power cord Turn on power switch Check 115 230 power switch setting Turn terminal power off and change fuses Check status of system Attach all cables and check for cable damage Check main port P3 interface cable pins 5 6 and 8 must be driven by 12 VDC or not connected at all for normal operation See Table 2 4 e 1 and 7 must be grounded 3 must be connected to the host transmitter 2 must be connected to the host receiver Turn on modem Attach different modem Check phone handset position Refer to technical representative for adjustment of contrast settings Set parity switch to match system Power down terminal and turn back on Set to half duplex and try to type If terminal will type check cables
19. or if the cursor is on the first tab position Back Tab moves the cursor to the first column on the line If the Protect mode is on Back Tab moves the cursor back to the start of the first preceding unprotected field If no preceding positions exist the cursor will not move If the cursor is at the first unprotected position on the page the code has no effect If no protected fields exist Home position is considered the start of an unprotected field 4 7 3 Clearing Tabs 4 7 3 1 Typewriter Tabs ESC 2 Clears the typewriter tab at the cursor column The code has no effect when the Protect mode is set 4 7 3 2 All Tabs ESC 3 Clears all tabs 4 8 PROTECT MODE 4 8 1 Application Using Protect mode during the creation of a page allows you to protect designated areas of the page from future change by the operator and control its transmission A typical application would be the creation of a form leav ing blank spaces for later entry of variable information Where the form headings not protected by Protect mode they would be vulnerable to change or accidental deletion as the form was being filled in 4 8 2 Effect Protected areas appear on the screen at half the regular intensity The cursor is not able to enter a field which has been protected but will instead advance across that area to the first unprotected field when entering arrow right or left Arrow up down linefeed or reverse linefeed may however move the curso
20. the application program s user documen tation for complete information 3 4 5 2 Block Mode Operating in the Block Mode generally consists of enter ing or changing text locally In this mode the terminal sends the results to the screen When you are satisfied with the results of the data entry or change you can press SEND or use a send data control seguence to send the data to the computer Block mode allows you to make all corrections before transmission To enter Block Mode enter ESC B or change it on the status line If the terminal is set in Block Mode on S2 and a ESCC is received or typed the terminal will revert to Full Du plex operation 3 4 6 Sending Data to the Printer The 925 will send a page of data from the screen to an auxiliary printer when PRINT is pressed SHIFT PRINT sends the time of day followed by CRLF and data to the printer see Chapter 4 Printing can also be controlled by the applications program 4 PROGRAMMING 4 1 INTRODUCTION Your computer program can completely control your 925 terminal by transferring the appropriate ASCII codes This chapter tells you how to translate keyboard func tions into remote control functions Unless otherwise specified in the text all control code sequences are transmitted to the 925 to elicit the re sponse associated with the code 4 2 MONITOR MODE The Model 925 provides a Monitor mode for displaying all characters received from the computer or entere
21. un screwing it counterclockwise 3 Remove the blown fuse and replace it with a3AG 1 amp slo blo 125V or 0 5 amp 250V fuse for 220 VAC applications instantaneous fast blow fuse 4 Install the fuse in the reverse order of Steps 1 through 3 6 2 2 Changing the Power Supply Fuses The terminal power supply fuses are installed in fuse clips on the power supply assembly inside the terminal see Figure 2 3 To replace either of these fuses pro ceed as follows Hazardous voltages are exposed in the cabinet Turn off the power switch and disconnect power before opening the terminal cabinet 1 Disconnect the terminal power cord from primary power 2 Turn the terminal upside down and set it on a soft surface to prevent marring the cabinet Remove the four Phillips screws that hold the cabinet cover on the terminal 3 Turn the terminal right side up and lift off the cab inet cover Nis WS Make sure there is adequate table space for the open terminal 4 Remove the blown fuse from its fuse clip see Fig ure 2 3 5 Replace the blown fuse with a 3AG 3 amp 125V fuse 6 Reinstall the terminal cover and secure it with the four screws Do not overtighten screws TABLE 6 1 TROUBLESHOOTING TERMINAL PROBLEMS Symptom Terminal dead no beep no cursor Terminal dead cursor may appear Loose or defective line or power supply fuses Terminal will not go on line Cursor will not appear System does
22. 20 per cent empty The DTR feature may be enabled or disabled by changing the following switch setting S3 switch 10 UP DTR Disconnected DOWN DTR Connected See 2 4 7 for field modifications which control DTR out put 4 15 TIME OF DAY CLOCK The 925 has a time of day clock The time of day will appear only when the status line is displayed during Set Up mode It will appear in the first field of the Status Line as follows TIME A AM P PM XX HOUR XX MINUTES 22 To change the time enter ESC SPACE 1 N HH MM where N A AM or P PM HH 2 digit number for the hour MM 2 digit number for the minutes Example If you wish to program 3 o clock in the afternoon enter ESC SPACE SPACE BAR 20H 1 P 0300 lt 1 The time of day may be sent to the printer for reports see Section 4 12 6 print functions The computer may reguest the time from the 925 by sending the following seguence ESC SPACE 2 The 925 will respond with a 6 character code A or P hour and minutes and CR 4 16 KEYBOARD KEYCLICK The Model 925 features an audible keyclick whenever a key on the keyboard is depressed The keyclick may be disabled either through a switch see Table 2 4 or soft ware control Keyclick ON ESC gt Keyclick OFF ESC lt 4 17 DISABLING THE KEYBOARD You can disable all keyboard functions by remote com mands from the computer Once the keyboard is dis abled it can only be enabled once again by anothe
23. ERMINATION CHARACTER SELECTION At the completion of each send sequence a Carriage Return CR is sent to the computer This termination character may be changed to any ASCII code To change the termination character enter ESC x 4NN where NN any two ASCII characters Example To change the termination character to a ETX enter CTRL NULL CTRL C ETX For NN two characters must be entered Use a NULL CTRL A as a filter code Line Terminator at the end of each line a US 1FH is transmitted To change the line termination char acter enter ESCx1NN where NN any two ASCII characters 4 12 PRINT FUNCTION PROGRAMMING The Model 925 printer port may be set for terminal page date transmittal data transmittal from the computer or 21 two way communications between a KSR type printer and the computer If during a print operation the device connected to the printer port cannot accept any more data the device may signal the terminal to stop sending data by setting P4 20 to 12 Vdc The device may then request the transmission of more data by setting P4 20 to 12 Vdc Refer to 2 4 7 for field modifications which affect the printer port The print function control sequences and their descrip tions follow 4 12 1 Page print ESC P Sends page data from Home through cursor position to the printer port and advances the page number by 1 Data entry on the advanced page may continue while the previous page is
24. G lt Invisible underline reverse ESC G Underline reverse blink ESC G gt Invisible underline reverse blink ESC G Half Intensity On ESC Half Intensity Off ESC ASCII CODE POSITION ASCII CODE Transmitted C Transmitted 65 A 66 a B 67 b C 68 c D 69 d E 70 e F 71 f G 72 g H 73 h I 74 i J 75 j K 76 k L 77 l M 78 m N 79 n O 80 o P 81 Pp Q 82 q R 83 r S 84 s T 85 t U 86 u Vv 87 v W 88 W X 89 x Y 90 y Z 91 Z 92 N 93 i 94 A 95 DEL RUB Figure 4 2 Model 925 Video Attributes SEARS 1948087 4 012345678913 78ABCDEF GHI JKLMNOPORSTUVHXYZIS J abedefohi Jk immoparstuvuxyz 9 6 SHI 0000180011 SWS XXX1000008 When used in combination with Protect mode all half intensity fields will denote a protected field Half inten sity fields do not take up a character space on the screen Nie a N When the 925 isin the 912 920 emulation mode all video attributes will respond to those used by the 912 920 ter minal see 925 Ouick Reference Guide inside back cover The entire screen of the 925 may be reversed from a black on green screen to a green on black screen or from green on black to a black on green with a one code seguence To reverse the screen enter ESC b black on green ESC d green on black S 7 I N Using one of the above codes does not take up a char acter space on the screen 4 7 TABS 4 7 1 Setting Tabs ESC 1 When the Protect m
25. ISH DD BLINKING BLOCK DU GERMAN DU BLINKING UNDERLINE UD FRENCH UD STEADY BLOCK UU SPANISH UU STEADY UNDERLINE 33 TeleVideo Systems Inc 1170 Morse Avenue e Sunnyvale CA 94086 No 30013 001 Revision B JKH TeleVideo 6 82 Printed in U S A
26. ITY OR ANY OTHER THEORY SHALL NOT EXCEED THE PRICE OF THE INDIVIDUAL UNIT WHOSE DE FECT OR DAMAGE IS THE BASIS OF THE CLAIM IN NO EVENT SHALL TELEVIDEO BE LIABLE FOR ANY LOSS OF PROFITS LOSS OF USE OF FACILITIES OR EQUIPMENT OR OTHER INDIRECT INCI DENTAL OR CONSEQUENTIAL DAMAGES Service Out of Warranty If your terminal is out of warranty when it needs service you should follow the same procedure to receive an RMA You will be responsible for all shipping costs Should your company require a purchase order for out of warranty repairs let us know the purchase order number when you call in One purchase order may cover several repairs but we will give each item its own individual RMA number This allows us to return each item quickly and not hold up the entire purchase order because of one item Technical Assistance Other than Repair The Technical Marketing Support Group is normally open from 8 00 a m until 5 00 p m Pacific Time continuously Monday through Friday If the line is busy and your problem can wait leave a message with the Tele Video operator and your call will be returned at our first opportunity Extended Warranty TeleVideo offers an Extended Warranty Contract To take advantage of this Extended Warranty you must sign the Extended Warranty Contract and return it together with full payment to Tele Video prior to the end of your normal warranty period The extended warranty lasts for one year the cost is 75 00
27. S232C and P4 PRINTER in parallel 4 12 6 Send Time of Day The 925 has a built in clock which keeps track of the time of day To transmit the time to your printer press the PRINT key in conjunction with the SHIFT key The time will then be transmitted to the printer followed by a CR LF and data 4 12 7 Printer Termination Character The printer s termination character may be repro grammed to any character desired To program the ter mination character use the following dialogue ESC pn Example To program a null for the termination charac ter type ESC p CTRL The default printer termination character is an ACK CTRL F 4 13 X ON X OFF CONTROL The Model 925 automatically transmits X OFF to the computer reguesting it to stop sending data when the terminal s receive buffer is almost full less than 16 char acters When the data in the buffers are processed out put to the screen or to the printer buffer the Model 925 automatically transmits X ON to the computer indicat ing that the computer may resume sending data to the terminal The X ON X OFF feature may be enabled or disabled with the following control seguences Enable X ON X OFF CTRLO and disable DTR Control Disable X ON X OFF CTRLN and enable DTR Control 4 14 DTR CONTROL The Model 925 Data Terminal Ready DTR line will go low whenever the 256 byte storage receive buffer fills to 240 bytes The DTR line will go high again once the buffer is
28. This turns on the Protect mode Protect mode causes half intensity and attribute characters to be protected from overwriting or erasure All visual attributes within pro tected areas are protected To remove Protect mode Protect OFF enter ESC All characters entered are displayed at full intensity 4 9 EDITING CONTROL The editing control sequences and a description of their functions follow Use of the Model 925 editing commands may result in the loss of data Read the following explanations of the editing control functions carefully 4 9 1 1 Set Local Edit Mode ESC k Sets the edit keys CHAR INSERT CHAR DELETE LINE ERASE PAGE ERASE SEND PRINT LINE INSERT LINE DELETE CLEAR BACKSPACE f T lt TAB and BACK TAB for local operation only These keys will affect data in the terminal no char acters associated with the keys will be transmitted to the host All other keys operate normally 4 9 1 2 Set Duplex Edit Mode ESCI Sets the edit keys see above to operate in the mode set for the alphanumeric keys For example if the terminal is set for Half Duplex operation refer to paragraph 3 4 5 1 1 the alphanumeric keys operate in Half Du plex mode and the edit keys operate in Half Duplex mode 4 9 2 Cursor Control The cursor control key operation is described in para graph 3 3 3 Escape and Control sequences may be sent from the host to perform the various cursor functions 4 9 2 1 Cursor C
29. Unprotect Only ESC 5 ESC5 Send Line All ESC 6 ESC 6 Send Page All ESC 7 ESC7 Send Message Unprotect Only ESCS ESCS Send Message All ESCs ESC s Monitor Mode On ESC U Monitor Mode Off ESCu or ESC X Enable Bidirectional Printer Mode CTRLR Disable Bidirectional Printer Mode CTRLT Enable X On Off CTRLO Disable X On Off CTRLN 32 FUNCTION 912C 920C 925 Extension Mode On ESC a ESC a Extension Mode Off ESCA ESCA Print Page Print ESC P ESCP Transparent Print On ESC Transparent Print Off ESC a Load User Line ESC f text CR Display User Line ESC g Turn Off 25th Line ESC h Reverse Linefeed ESC j Set Loca Edit Mode ESC k Set Duplex Edit Mode ESC Select Termination Character ESCxdnn Set Cursor Attribute ESC n Set Print Termination Character ESC pn RR Load Time ESC sp 1 nnnnn Read Time ESC sp2 S1 RIGHT REAR S1 7 8 9 10 1 2 3 4 7 8 9 10 1 2 3 4 I ae ae RATE RATE RATE xfosfoxfor 18 i VAN PORTED RATE ja om ___wanrenronome em var rooma ajaja AMIS E 3 6 7 300 peffe EDIT EMULA parity parity parity SCREEN Mooe MODE REFRESH CARRIAGE MODE TION VIDE RETURN 1200 o oa ome me we e oe ov on i 2400 3600 345 78 4800 DDD NOPARITY DD HDX felon e DDU ODD PARITY UD FDX ue ue ur on s00 DUU EVEN PARITY DU BLK UDU MARK PARITY 1 UUU SPACE PARITY S3 INTERNAL 1 6 7 8 9 10 CHAR CHAR CURSOR CURSOR TIME OUT 23 56 DD ENGL
30. ab Protect Only ESC i 4 7 2 3 Back Tab ESC I 4 7 3 Clearing Tabs 4 8 Protect Mode 4 8 1 Application 4 8 2 Effect 4 8 3 Procedure 4 8 3 1 Input 4 8 3 2 Protection 4 9 Editing Control 4 9 1 1 Set Local Edit Mode 4 9 1 2 Set Duplex Edit Mode ESCI 4 9 2 Cursor Control 4 9 2 1 Cursor Control Codes 4 9 2 2 Normal and Reverse Linefeed 4 9 2 3 Editing Commands 4 9 2 4 Clear Function 4 10 Send Function 4 10 1 Send Line Unprotected ESC 4 10 2 Send Page Unprotected ESC 5 3 Send Line All ESC 6 4 Send Page All ESC 7 5 Send Message Unprotected ESC S 6 Send Message All ESC s Termination Character Selection Print Function Programming 1 Page Print ESC P 2 Transparent Print On ESC 2 1 Transparent Print Off ESC a 3 Extension Mode On ESC 5 Enable Bidirectional Port CTRL R 6 Send Time of Day 7 Printer Termination Character X ON X OFF Control 14 DTR Control 15 Time of Day Clock 4 16 Keyboard Keyclick 4 17 Disabling the Keyboard 4 18 Screen Time Out 4 19 Page Control 4 20 User Line 4 20 1 To Load the User Line 4 20 2 Entering Data 4 21 912 920C Emulation 4 22 Cursor Attributes 4 23 Screen Off S de et eae 4 1 4 1 4 1 4 1 4 1 4 1 4 1 4 1 4 1 4 1 4 1 4 1 4 1 4 1 4 1 4 1 4 1 4 1 4 1 PREVENTIVE MAINTENANCE 5 1 Care 5 1 1 Cleaning 5 1 2 Inspection TROUBLESHOOTING AND REPAIR 6 1 Troubleshooting 6 1 1 Testing the Terminal Self Test 6 2
31. al controls are located at the rear of the terminal see Figure 2 2 e Baud rate switches S1 Function switches S2 Internal Switch S3 Set these prior to turning on power to the terminal as explained in 2 4 4 and keep a permanent record on page iv of how you have set the switches The connectors to the main interface and printer ports are also located here Once these have been set during installation they will seldom need to be changed unless the terminal is being used with several different computer systems 3 2 2 Turning On the Terminal Turn on the terminal as follows 1 Make sure the ON OFF switch at the back of the terminal Figure 2 2 is OFF 2 Plug the terminal cord into a grounded outlet 115 VAC in United States 3 Push the end of the rocker power switch marked with a white dot The terminal should beep within one second indicating that power is on and the CPU has initialized the terminal After another 10 to 15 seconds the cursor should appear in the up per left corner of the screen HOME 4 If the cursor does not appear at the HOME posi tion press the HOME key on the keyboard If the cursor still does not appear check the contrast con trol at the rear of the terminal Figure 2 2 5 Adjust the contrast control for the desired screen intensity 6 Adjust the tilt of the screen by unscrewing the leg in the center front 7 Follow the sign on protocol required by your computer sy
32. anical action Computer An electronic system which in accordance with its pro gramming will store the process information and per form high speed mathematical or logical operations Control Codes Special nonprinting codes which cause the terminal or computer to perform specific electronic or mechanical actions such as setting tabs etc CPU Central Processing Unit The brains of a computer or computer terminal that section where the logic and con trol functions are performed Default Condition which exists from POWER ON or RESET if no instructions to the contrary are given to the terminal DEL The ASCII DELETE code used in some instances to delete transmitted characters or to exit modes of operation Digit One of the numerals in a number system Digital Information in the form of individual parts bits or digits EOT An ASCII code that means end of transmission EOT used in the EOT ACK handshaking protocol The computer sends an EOT at the end of each trans mission to the terminal When the terminal is ready to receive more data it transmits an acknowledge ACK back to the computer ESC An ASCII code meaning escape which is used to con trol various electronic and mechanical functions of the terminal Full Duplex In full duplex communication the terminal can transmit and receive simultaneously The transmitted data is not printed locally unless it is echoed back by
33. can sound a short loud bell upon your command To sound the bell press down CTRL and G at the same time si TAN From now on you will not be told to press CTRL and the other character at the same time The command will be shown as CTRL G instead 3 3 2 4 Break You can transmit a 250 millisecond break pulse a break signal to your computer system The effect will depend on the operating program in your computer system Usu ally it stops communication 3 4 BASIC OPERATIONS This section describes various options available to you as you use the terminal Setting up the terminal e Editing data e Tab controls e Emulating Tele Video 912 and 920 terminals e Communicating with your computer system e Printing TABLE 3 2 Status Line Fields TIME AM 00 13 i DUPE 3 4 1 925 Status Line and Setup Mode The 925 has a status line which is only displayed during setup mode To display the status line and enter setup mode press the SHIFT key and the Set Up No Scroll key simultaneously This sequence will display the status line on the 25th line of the screen as shown in Figure 3 2 You may change fields on the status line by moving the cursor to the right using the cursor right key or to the left using the cursor left key to the field to be changed When the cursor is in the field you wish to change press the T key to toggle the field to the mode desired Field descriptions are shown in Table 3 2
34. causes the terminal to transmit an LF code to the computer and the cursor to be moved down one line on the screen in half duplex or echoed by the computer in full duplex CTRL H Moves cursor one character to the left CTRL K Moves cursor up one line CTRL V Moves cursor down one line If the cursor is on the bottom line of the screen the display will roll up one line If the cursor is on the bottom line of the page the code has no effect CTRL L Moves cursor one character to the right The DEL key sends an ASCII DEL character to the computer portion of the 925 The computer echoes the code back to the 925 to be performed This is usually interpreted by the 925 asa character erase code Transmits a 250 millisecond ASCII Break pulse to the computer Replaces all unprotected characters on the page with spaces When pressed the same time as SHIFT ESC it clears the entire page to nulls and turns off Protect and Half Intensity modes PRINT causes all data on a page from the home position to the cursor position to be output through the printer port The data is output with a CR LF and null automatically inserted at the end of each 80 character line When Print is pressed at the same time as SHIFT the time of day followed by a CR LF and data will be transmitted out the P4 printer port 9 TABLE 3 1 FUNCTION OF KEYS Repeat Description Transmitted Action Key Name Yes No Yes No Sen
35. ch interference Operation of this equipment in a residential area is likely to cause interference in which case the user at his own expense will be required to take whatever measures may be required to correct the interference MODEL 925 OPERATOR S MANUAL Specifications and Information Subject to Change Without Prior Notification TeleVideo No B300013 001 Revision B Copyright TeleVideo Systems Inc 19 May 1982 Copyright 1982 by TeleVideo Systems Inc All rights reserved No part of this publication may be reproduced transmitted transcribed stored in a retrieval system or translated into any language or computer language in any form or by any means electronic mechanical magnetic optical chemical manual or otherwise without the prior written permission of TeleVideo Systems Inc 1170 Morse Avenue Sunnyvale California 94086 WARRANTY POLICY AND RETURNED MATERIAL PROCEDURE SPECIFICATIONS 1 INTRODUCTION 1 1 Description of Manual 1 2 How to Use This Manual 1 3 Description of Terminal 1 4 Protect Yourself 1 5 Protect the Terminal 2 INSTALLATION 2 1 Introduction 2 2 Unpacking and Inspecting the Terminal 2 2 1 Shipping Damage Inspection 2 2 2 Unpacking the Terminal 2 2 3 Inspecting the Terminal 2 2 4 Reporting Damage 2 2 5 Reshipping the Terminal 2 3 Preparing the Site 2 3 1 Power Requirements 2 3 2 Physical Requirements 2 4 Installation 2 4 1 Power Configuration 2 4 1 1 115 VAC Configuration 2 4 1 2 230
36. cle US only 2 3 2 Physical Requirements 13 H X 16 W X 20 46 D 33 66 cm H X 40 96 cm W X 50 96 cm D e Flat level area 13 H X 1644 W X 2016 D 33 66 cm H X 40 96 cm W X 50 96 cm D Refer to Figure 2 1 Surface dimension e Recommended ventilation clearance is 4 inches 10 2 cm on all sides 2 4 INSTALLATION The actual installation and set up consists of only three steps 1 Configuring the terminal for either 115 or 230 VAC operation 2 Configuring and connecting the terminal to the computer and printer connectors 3 Setting up the terminal s operating switches and jumper options These procedures should only be performed by techni cally qualified personnel 2 4 1 Power Configuration Depending on your location the terminal can be config ured to operate with either 115 VAC United States or 230 VAC international 2 4 1 1 115 VAC Configuration Keep the three prong plug which is provided with the terminal and make sure your outlet is grounded If an adapter is used ground with a pigtail 2 4 1 2 230 VAC Configuration If you are located outside the United States and use 230 VAC power cut off the US style three prong plug pro vided and install a connector compatible with your local power receptacles The power cord wires are color coded as foliows e Green Earth ground e Black Primary power hot White Primary power return neutral 2 4 1 3 Setting Power Select Switch
37. d Key FUNCT Key F1 F11 Function Keys Set Up No Scroll Y N N Character Insert Although escape seguences appear here with a space before the alphanumeric character this space is not to be entered as part of the seguence It is included only for the sake of clarity Data may be sent to a computer from the 925 by several methods When SEND is pressed the terminal transmits all data on the page from home through the cursor position When SEND is pressed the same time as SHIFT the terminal transmits all data on the present line from the first column through the cursor position Nis PIN See Section 4 10 for send routines The FUNCT key transmits a user selected character bracketed by CTRL A 01H and Carriage Return CR NY PAN See Section 4 4 for FUNCT key The function keys F1 through F11 in conjunction with SHIFT key provide 22 special keys that when pressed transmit a 3 code sequence to your computer When received by your computer this sequence may initiate a special form or subroutine in the program that causes the 925 to display or perform a particular function NIS aN See Section 4 3 for function keys The No Scroll key stops screen updating during normal operation When pressed the 925 stops updating the screen When pressed again the 925 starts updating the screen If the receive buffer fills up while update is disabled X Off wi
38. d on the keyboard including escape and control sequences refer to Table 4 1 The escape and control sequences on the screen will provide visual cues in long program routines To control the Monitor mode use the following code sequences Monitor Mode ON ESCU Monitor Mode OFF ESC u or ESC X Using monitor mode will make program debugging easier TABLE 4 1 MONITOR MODE CODE 4 4 3 FUNCTION KEYS The Model 925 has the ability to transmit special func tion codes to your computer This is possible through the eleven function keys located on the keyboard Figure 3 1 Operation of these keys F1 through F11 causes the fol lowing three code seguence to be transmitted When the shift key is used in addition to the function keys the following three code seguence is transmitted Unshifted Key Code Shifted Code Fl CTRL A CR CTRL A CR F2 CTRL A CR CTRL A CR F3 CTRL A CR CTRL A F4 CTRL A CR CTRL A CR F5 CTRL A CTRL A CR F6 CTRL A CR CTRL A F7 CTRL A F8 CTRL A F9 CTRL A F10 CTRL A Fil CTRL A lt 1 To change the default value of the function keys the sys tem ROM of the 925 must be replaced with a modified 2732 EPROM CR CTRL A CR CTRL A CR CTRL A CR CTRL A CR CTRL IA ema TOUHmonwv gt 6 O e FA 0 20 on O ps ASCII SCREEN CHARACTER 00 4 4 FUNCT FUNCTION KEY Not to be confused with the Function keys 4 3 the FUNCT key transmits a user selected character brack eted by Contr
39. e T3 1 Dimensions 2 3 2 Disabling enabling keyboard 4 17 DTR Control 4 14 Duplex Edit 4 9 12 Duplex Modes 3 4 5 1 1 Edit Commands 4 9 2 3 Line see Line Edit Edit Modes 4 9 1 2 Editing 3 4 2 4 9 Emulations 3 4 4 4 21 Enter T3 1 Enabling Disabling Keyboard 4 17 Escape Key T3 1 Extension Mode 4 12 3 Field Modifications 2 4 7 Field Tabs 4 7 2 2 INDEX Full Duplex Mode 3 4 5 1 2 FUNCT Key T3 1 4 3 Fuses changing 6 2 1 6 2 2 Half Duplex Mode 3 4 5 1 1 Half Intensity 4 8 3 1 Home T3 1 Inspection 2 2 5 1 2 Installation and Checking Ch2 2 4 2 5 Key Functions Table 3 1 Key Repeat Actions T3 1 Specifications Keyboard Controls 3 3 Keyboard enable disable 4 17 Keyboard Layout 3 3 1 Keyclick 4 16 Line Delete T3 1 Line Erase T3 1 Line Feed T3 1 Line Insert Delete Key T3 1 Manual How to Use 1 2 Memory option two page 2 4 6 Monitor Mode 4 2 Monitor Control Characters T4 1 Overview 1 3 Page Control 4 19 Page Erase T3 1 Physical Requirements 2 3 2 Power Configurations 2 4 1 Power Requirements 2 3 1 Power Select switch 2 4 1 3 Preventative Maintenance Ch5 Print Key T3 1 Print Buffer transparent 4 12 2 Print Copy Print extension 4 12 4 Printer Interface 2 4 3 Printer Port T2 2 Printer Termination Character 4 12 7 Programming Ch4 Programming Function keys 4 3 Programming Print function 4 12 Programming Tabs 4 7 Programming User Line 4 20 Protected Mode 4 8 Reading Cursor 4 5 2
40. e 925 has the capability of emulating the TeleVideo 912 and 920 terminals To set the 925 to the 920 emula tion mode refer to Table 2 3 Switch Settings All con trol codes for this emulation can be found in Chapter 4 3 4 5 Transmission Modes You may set the 925 to one of three transmission modes by entering the setup mode or setting the switches See Figure 3 3 we 1 Block 2 Conversation a Half Duplex HDX b Full Duplex FDX Figure 3 3 Communication Modes 3 4 5 1 Conversation Mode In this mode two way transmission occurs continuously between the screen and the computer To enter Conver sation mode enter ESC C The 925 is conversational in either half or full duplex 3 4 5 1 1 Half Duplex Mode The Half Duplex mode sends keyboard entries to the screen and to the computer at the same time 3 4 5 1 2 Full Duplex Mode The Full Duplex mode sends keyboard entries to the computer only If the computer is programmed to act upon a code received from a keyboard entry it may echo the result back to the 925 The time needed to echo back the information is so short it will seem to happen simul taneously For example if the A is pressed on the keyboard the computer will probably send the A back to the 925 s screen 14 What the computer sends back to the screen if anything and the action it takes on data text or command se quences sent to it depends on the application program in use Refer to
41. erminal is delivered to you inspect the ship ping container as wel as the terminal inside and out for damage before taking it to your installation site You should inspect the container for obvious damage before accepting delivery of the terminal If damage is found note it on the waybill and require the delivery agent to sign the waybill Notify the transfer company immedi ately and submit a damage report to the carrier your dealer and to Tele Video If no exterior damage is found unpack the terminal and inspect it for hidden damage 2 2 2 Unpacking the Terminal Carefully unpack the terminal from the shipping con tainer Avoid using sharp instruments to open the con tainer Save the packing material for possible use in reshipping the terminal 2 2 3 Inspecting the Terminal After you unpack the terminal inspect it thoroughly for hidden damage and loose components or fittings The inspection checklist is as follows 1 Remove the terminal cover by removing the screws underneath the front bottom and the rear of the terminal Lift up the cover carefully 2 Inspect the keyboard and display cabinet interior for shipping damage 3 Examine cable harnesses for stress loose or bro ken wires or broken cable ties 4 Examine all internally mounted components for loose or missing hardware 5 Tighten all loose hardware 6 Clean loose debris from the cabinet interior 7 Replace the cover Do not overtighten the screws
42. he trace between E3 and E4 and install a jumper between E1 and E2 2 4 6 Two Page Memory Option You can add one additional page of display memory to the 925 This is not normally factory installed Follow these steps to install this option 1 Unplug the terminal and remove the top cover 2 Install a 6116 2K X8 bit 150 NS RAM chip onto the control board If the logic board is labeled 001 in stall the chip in position A48 If the board is labeled 002 install it in position A33 The notch on the chip should face the same direction as the notches on the other chips Be careful not to bend the pins 3 Check the notch position again before installing the cover and turning on power again 2 4 7 Additional Field Modifications The following field modifications may also be made The directions given in this section apply to boards labeled 001 or 002 1 For handshaking use pin 4 on P4 rather than pin 11 on P4 Cut the tue between E6 and E7 and install a jumper from ES to E7 2 To disconnect DTR from the printer pin 20 on P4 cut the trace between E10 and E11 3 To control DTR output pin 20 on P3 with RTS out put pin 4 on P3 cut the trace between E15 and E16 and install a jumper between E14 and E16 2 5 CHECKING YOUR INSTALLATION Before you proceed to the next chapter and turn on the terminal check to be sure you instalied the terminal correctly 1 Did you install the correct power plug for your wall o
43. inal through commands from your computer system programming special functions set ting visual attributes monitoring the program loading and reading the cursor position disabling the keyboard and printer 5 Preventive Maintenance Periodic cleaning and inspection of the terminal 6 Troubleshooting and Repair Troubleshooting simple problems using a table of symp toms possible causes and solutions using self test Glossary Explanation of terms commonly used in this manual Appendices Reference tables Index References to main subsections by subject 1 2 HOW TO USE THIS MANUAL Each subsection of the manual is numbered To find a topic later look in the index and find the appropriate subsection As you read the manual you will notice some special symbols at the left margin of the text These symbols call your attention to information of special importance The symbols used are N General note giving information vis to every operator Programming note giving infor mation of special significance to the programmer God Warning giving information con cerning the safety of the operator or possible loss of data When you see this note STOP and read the note before proceeding On the back cover is the Operator s Quick Reference Guide listing all control and escape commands for the terminal Emulation commands are given in the Operator s Quick Reference Guide The descriptive text of the manual
44. ine or page with a space of the proper intensity When these keys are pressed at the same time as SHIFT they cause a line erase to null ESC t or a page erase to null ESC y 3 3 2 Other Controls 3 3 2 1 Cursor The lighted rectangular block which appears on the screen indicates the entry spot for the following characters to be typed It is called a cursor During typing the cursor moves from left to right As it reaches the end of a line it wraps around to the beginning of the next line If you place the cursor over a character which you have already typed the character within the cursor will be changed into a reverse image within the cursor If the characters have been green on a black background the cursor will appear as a green rectangle around a black character The movement of the cursor is easy to control To move the cursor press one of the cursor control keys marked with an arrow The cursor will move in the direction of the arrow until you release the key To return the cursor quickly to the top left position on the screen press HOME The cursor will now be in Column One Line One NY PS The cursor display may appear any one of five ways See Chapter 4 3 3 2 2 Cursor Addressing The Model 925 may address the cursor to any location on the screen through a special ESC code The cursor may also be addressed to any page row or column the opera tor wants to address 3 3 2 3 Bell The terminal
45. ll be sent to the computer causing it to stop sending data When update is reenabled the buffer will empty causing X On to be sent and data to be transmitted to the computer During normal operation the No Scroll function of the Set Up No Scroll key is active The Set Up key manually displays and changes the 925 s operating characteristics The set up function is enabled by pressing Shift and Set Up No Scroll at the same time The Character Insert key ESC O enters a space at the cursor position causing all succeeding characters to shift one position to the right All characters shifted past the 80th character will be lost TABLE 3 1 FUNCTION OF KEYS Repeat Description Transmitted Action Key Name Yes No Yes No Character Y N Y The Character Delete key ESC W deletes the character at the Delete cursor position and causes all succeeding characters to shift one position to the left All characters shifted to the cursor position will be deleted Line Insert Y N Y The Line Insert ESC E key creates an entire line of space Delete characters on the cursor line The data on the cursor line and all following lines shift down one line the last line on the page is lost The Line Delete ESC R causes the entire line at the cursor position to be deleted All following lines shift up one line Line Erase amp Y N N Line Erase ESC T and Page Erase ESC Y replace the Page Erase unprotected data from the cursor to the end of the l
46. n ESC rc ESC rc Read Cursor Page Row Column ESC ESC Read Cursor Row Column ESC ESC Carriage Return CTRL M CTRL M Linefeed CTRL J CTRL J Newline CTRL _ CTRL _ Tab CTRL I CTRL I Back Tab ESCI ESCI Back Page ESC J Set Column Tab ESC 1 ESC 1 Clear Column Tab ESC 2 ESC 2 Clear All Tabs ESC 3 ESC 3 Field Tabs ESCi ESCi Clear All to Nulls ESC ESC Clear Unprotected to Spaces ESC or CTRL Z CTRL ZorESC or ESC Clear All to Half Intensity ESC Clear Unprotected to Null ESC ESC Clear All to Space ESC Character Insert ESCO ESCO Character Delete ESCW ESCW Line Insert ESCE ESCE Line Delete ESCR ESCR Advance Page ESCK ESCK Keyclick On ESC gt Keyclick Off ESC lt End of Reverse Video ESC k ESC G0 Reverse Video ESC ESC G4 Start Blink Field ESC A ESC G2 Start Blank Field ESC ESC G1 End Blink Blank ESCq ESC GO Start Underline ESC ESC G8 End Underline ESC m ESC G0 Black On Green ESC b Green On Black ESC d Erase EOL with Spaces ESCT ESCT Erase EOL with Nulls ESCt ESC t Erase EOP with Spaces ESCY ESCY Erase EOP with Nulls ESC y ESCy Auto Page On ESC v ESC v Auto Page Off ESC w ESC w Lock Keyboard ESC CTRL R Unlock Keyboard ESC CTRL T Protect Mode On ESC amp CTRL O Protect Mode Off ESC CTRL N Write Protect Half Intensity Off ESC ESC Write Protect Half Intensity On ESC ESC Block Mode On ESC B ESCB Conversation Mode On ESC C ESC C Blank Screen ESCO Normal Screen ESCN Send Line Unprotect Only ESC 4 ESC 4 Send Page
47. nation with SHIFT the ESC key operates only locally to invoke the terminal functions and special features of the 925 It causes the next character entered to be interpreted as a command 304 IN The Escape key is used in conjunction with one alphanumeric character in the command seguence i e the Escape key is pressed and released before the second key is pressed Key Name RETURN ENTER HOME LINEFEED BACKSPACE lt DEL Delete BREAK Clear Space Print Key See Section 4 12 for print functions Transmitted Yes No Y TABLE 3 1 FUNCTION OF KEYS Repeat Action Yes No Description CTRL M The RETURN and ENTER keys perform the same function They send the ASCII code OD for a carriage return CR to the display or computer Depending on the communication mode used the code causes the terminal to transmit a CR to the computer and or the cursor to be moved to the first unprotected position If the entire current line is protected the code moves the cursor to the next unprotected position on the page Nie JN The 925 features an auto wraparound function which eliminates the need to manually enter a carriage return and a linefeed at the end of each 80 character line CTRL N Moves cursor to first unprotected character position on the page usually Column One of Row Line One CTRL J The LINEFEED key sends an ASCII code OAH for a linefeed LF to the computer The code
48. nd capitalizes alpha characters Locks the SHIFT keys so that all alpha keys transmit codes for upper case characters The key is pressed to lock and pressed again to release CTRL I TAB moves the cursor forward to typewriter tabs Protect mode off or to the start of the next unprotected field Protect mode on ESC I Moves cursor backward to typewriter tabs Protect mode off or to the previous start of an unprotected field Protect mode on Generates normally nondisplayed ASCII control codes 32 when used in conjunction with another key The control key combinations are used for special action by the terminal and or the application program in the computer sly TiN The Control key is always used simultaneously with the other character in the command i e the control key is pressed first and held down while the other key is pressed It is similar in action to the SHIFT key The commands which require simultaneous depression of two keys are indicated by a slash separating the two key names The Escape key sends an ASCII code for Escape to the display processor The key is generally used to momentarily leave escape an application program in order to use a special feature or function Another function of the Escape key causes the next control character entered to be displayed on the screen This facilitates putting control characters on the screen instead of going into Monitor mode LOC ESC When pressed in combi
49. nd displays the second page Auto flip on ESC v When the cursor is advanced past the 24th line 80th character the 925 will flip to the next page Auto flip off ESC w When the cursor is advanced past the 24th line 80th character the cursor will move to the HOME position 4 20 USER LINE 4 20 1 Toload the User Line Enter ESCf CR where data to appear in the user line up of 79 characters To cause your entry to be displayed enter ESC g You can enter data and display it later or you may dis play the blank User Line before entering data This al lows you to see the data as it is loaded The cursor will not enter the User Line while you are inputting data 4 20 2 Entering Data You can enter up to 79 characters of text on the User Line Press RETURN to terminate entry of the user message lt 110 The User Line will be cleared when power is turned off oran ESC hisreceived 4 21 912C 920C EMULATION The model 925 offers a firmware emulation of the Tele Video Models 912C and 920C S PAN You can put the 925 in the 912 920 emulation mode by entering the set up mode or putting S1 dip switch two in the down position The differences in codes between the 925 and 912 920 are shown in the Operator s Quick Reference Guide 4 22 Cursor Attributes The cursor display may appear any one of five ways To set the cursor display enter the control code for the de sired attribute Type the code in
50. ne of data on the page The new line contains spaces Shifted causes a linefeed With the Protect mode off or on and Auto Page on linefeed advances the cursor to the next line on the page When it reaches the bottom of the page it advances to the first line of the next page When it reaches the last line of the last page it advances to the first line of page 0 With the Protect mode on and Auto Page off the cursor advances to the top of the current page when it reaches the bottom of the page Reverse linefeed ESC j Moves the cursor up one line for each reverse linefeed received If the Protect mode is on and Auto Page is off the cursor stops when it reaches the top line of the page If Auto Page is on and the Protect mode is on or off the cursor moves to the last line of the previous page when it reaches the first line of the current page Ifthe cursor is at line 1 of page 0 it will not move If the Protect mode and Auto Page are off the screen will scroll down one line when the cursor reaches the top line of the screen If the cursor is also at the top of the page the page will scroll down one line caus ing a new line of data to appear at line 1 of the screen and deleting the last line of the current page Shift 1 causes a reverse linefeed 4 9 2 3 Editing Commands Character Insert ESC Q Causes the character at the cursor to move right one column and enters a space character at the cursor position The characte
51. ode is on the ESC 1 code generates a vertical column of half intensity spaces from the cursor position down to the first write protected character or to the end of the page whichever is first When the Protect mode is off the code sets a typewriter style column tab GH I JKLMNOPGRSTUUMXYZL abcdefghi jklmoparstuvumuziiit 17 Half intensity Off Ku Half Intensity On Normal green on black video Blank Blink Invisible blink Reverse black on green video Invisible reverse Reverse blink Invisible reverse blink Underline Invisible underline Underline blink Invisible underline blank Underline reverse Invisible underline reverse Underline reverse blink Invisible underline reverse blink SWe 110010000 4 7 2 Using Tabs 4 7 2 1 Typewrite Tab Protect and Unprotect CTRL D When the Protect mode is off the code causes the cursor to advance through the next typewriter style tab set If no tabs are set the code has no effect and the cursor will not move When the Protect mode is set the cursor is moved to the first unprotected character following the next protected field 4 7 2 2 Field Tab Protect only ESC i With the Protect mode set the cursor moves exactly as described for CTRL I above With the Protect mode off this code has no effect 4 7 2 3 Back Tab ESC I When the Protect mode is off the code causes the cursor to back to the previous tab position set If no tabs are set
52. ol A SOH and a Carriage Return CR For example if a Control A C CR seguence is reguired for a special operation in a text editing program pressing FUNCT and Cat the same time transmits CONTROLA CCR to the computei automatically 4 5 ADDRESSING AND READING THE CURSOR 4 5 1 Addressing the Cursor The computer can tell the terminal where to position the cursor with a four character escape seguence See Table 4 2 This is called loading the cursor To load the cursor on a 925 with two pages of memory installed enter ESC PRC where P R C 0 for page 1 1 for page 2 the desired row line the desired column character Use Table 4 2 to find the ASCII code representing the desired row and column Find the appropriate ASCII code corresponding to the desired column position 1 through 80 possible and enter that code To load the cursor with one page of memory standard enter ESC re where r desired row line c desired character For example if you want to program the cursor to go to Row 9 column 50 enter ESC Q lt r If your computer inserts nulls between characters load ing the cursor will not function as described instead the cursor will go to an unpredictable position 4 5 2 Reading the Cursor The computer can also read the cursor s page row and column position To read the cursor s position enter ESC To read the cursor position with more than one page of memory installed ente
53. ontrol Codes The cursor control code sequences and a description of the functions follows e Cursor up CTRL K Moves the cursor up one line until it encounters the top of the screen If the cursor is not on the first line of the page the display will roll down one line each time until the cursor reaches the top of the page Once it reaches the top of the page further receipt of the code has no effect Cursor down CTRL V Moves the cursor down one line If the cursor is on the bottom line of the screen the display will roll up one line If the cursor is on the bottom line of the page the code has no effect Cursor left CTRL H Same as BACKSPACE Moves the cursor left to the next unprotected posi tion on the page If the cursor is currently in the first column of the line it will move to the last column of the preceding line or to that line If Auto Page is off and the cursor is currently at the Home position or the first unprotected position on the page the code has no effect If Auto Page is on and the cursor is at the Home position or the first unprotected position on the page the cursor will move to the end of the preced ing page or to the last position of the last unprotected field of the preceding page If the current page is page 0 the code has no effect Cursor right CTRL L Moves the cursor right one column if at column 80 it moves the cursor to the first column of the next line With Auto Page off and
54. print buffered transparent buffered with screen copy COMMUNICATION PROTOCOL X ON X OFF DTR DIMENSIONS Cabinet dimensions 16 50 41 9 cm wide X 14 00 35 6 cm deep X 14 25 36 2 cm high Keyboard dimensions 16 50 41 9 cm wide X 7 50 19 0 cm X 3 00 7 6 cm high VENTILATION REOUIREMENTS Minimum 4 inches 10 2 cm WEIGHT Cabinet Weight 30 Ibs 13 6 kg Keyboard Weight 4 5 Ibs 2 04 kg Shipping Weight 44 ibs 19 96 kg AMBIENT OPERATION TEMPERATURE 32 F 0 C to 122 F 50 C RELATIVE HUMIDITY nonoperating No restrictions POWER REQUIREMENTS 115 VAC at 0 5 amp 230 VAC at 0 25 amp 50 60 Hz 55W 1 INTRODUCTION 1 1 DESCRIPTION OF MANUAL This manual will teach you how to install operate pro gram and troubleshoot your new terminal The manual has been designed to help you use the terminal easily regardless of your previous experience with terminals As you progress through the manual you will find the following chapters 2 Installation Setting up your site for the terminal the power require ments unpacking and checking the terminal setting switches to take advantage of the options available con figuring the terminal for your computer system and printer 3 Operation Turning on the terminal a description of the keyboard and functions of the keys using tabs editing sending data to the computer and the printer 4 Programming Controlling the term
55. printing This print mode prints page data exactly as entered plus line delimiters a carriage return and a linefeed at the end of each line Control characters are also sent to the printer port as are a car riage return and a linefeed at the end of the transmitted data The terminal transmit an ACK to the host indicat ing that all print data has been output to the printer port 4 12 2 Transparent print on ESC Sends all subsequent data received by the terminal in cluding control and escape characters to output to the printer port No screen updating occurs while the mode is active The printer and main baud rates must be the same 4 12 2 1 Transparent print off ESC a Turns off the transparent print The printer and main baud rates must be the same 4 12 3 Extension copy print mode on ESC Causes all subsequent data received by the terminal to be sent to the screen and to the device connected to the nen the same 4 12 4 Extension copy print mode off ESC A Turns off the Extension copy print mode Screen up dating continues normally 4 12 5 Enable bidirectional port CTRL R Functionally connects P3 RS232C and P4 PRINTER in parallel The function allows a device connected to the printer port such as a keyboard send receive KSR printer to communicate directly with the computer while allowing screen update to continue 4 12 5 1 Disable Bidirectional Port CTRL T Functionally disconnects P3 R
56. r ESC This causes the computer to read the cursor s current page if additional page is installed row and column position Row and column are read as specified in the cursor addressing table followed by a carriage return 4 6 VIDEO ATTRIBUTES The 925 screen attributes see Figure 4 2 may be con trolled to provide reverse video half intensity under line blink and blank The attribute characters are normally displayed as a space on the screen They also appear as a half intensity space on a black on green background The attributes are implemented with an ESC G seguence followed by a parameter For the video attri butes enter the following codes in the exact seguence shown below TABLE 4 2 MODEL 925 CURSOR ADDRESSING CODES POSITION ASCH CODE POSITION R or C Transmitted c 1 Space 33 2 34 3 g 35 4 36 5 37 6 38 7 amp 39 8 40 9 41 10 42 11 sg 43 12 44 13 45 14 46 15 47 16 48 17 0 49 18 1 50 19 2 51 20 3 52 21 4 53 22 5 54 23 6 55 24 7 56 25 8 57 26 9 58 27 59 28 60 29 lt 61 30 62 31 gt 63 32 64 Value of R can t be greater than 24 16 Normal green on black video ESC G Blank ESC G1 Blink ESC G2 Invisible blink ESC G3 Reverse black on green ESC G4 Invisible reverse ESC G5 Reverse blink ESC G6 Invisible reverse blink ESC G7 Underline ESC G8 Invisible underline ESC G9 Underline blink ESC G Invisible underline blank ESC G Underline reverse ESC
57. r at column 80 is lost If the Protect mode is on this control will insert from the cursor position to the end of the line or to the first protected field Character Delete ESC W Deletes the character at the cursor position and moves all following char acters left one position At the end of the delete function a space character is written into the last position on the line If Protect mode is on character delete operates only from the cursor position to the end of the unprotected field or line Line Insert ESC E With the Protect mode off inserts a line consisting of fill characters at the cursor position This causes the cursor to move to the start of the new line and all following lines to move down one line resulting in the loss of the last line on the page If the Protect mode is on a line insert com mand has no effect Line Delete ESC R When Protect mode is off deletes the line at the cursor position and all follow ing lines move up one line Also causes the cursor to move to column 1 of the line and fill characters to load into the last line of the page Has no effect when Protect mode is on Erase to End of Line ESC T Erases all unpro tected characters from the cursor to the end of the line or field if in the Protect mode and replaces them with fill characters If Half Intensity is on fill characters in half intensity will replace the erased characters Erase to End of Line with Nulls ESC t Era
58. r remote command from the computer If your computer system echoes all codes the keyboard may be accidentally disabled To disable the keyboard remotely enter ESC While the keyboard is disabled all keys are disabled ex cept FUNCT PRINT BREAK To subseguently enable it you must receive an ESC from the computer or type a SHIFI BREAK BREAK reset from the keyboard 4 18 SCREEN TIME OUT The 925 has a time out device used to increase the life of the phosphor on your screen If this feature is selected see Table 2 4 the data displayed on the screen will turn off 15 minutes after the last keystroke entered The 925 is normally shipped with this feature disabled To display the screen after it has shut off press any key No data will be lost as long as the terminal has not been turned off 4 19 PAGE CONTROL The Model 925 has the option of two 24 line pages of display memory These pages may be incremented for ward or backward one page at a time When the next page or previous page is called to the screen the cursor assumes the last position previously occupied on that page To control the paging functions enter the follow ing codes in the exact sequence shown below Do not enter the spaces between the characters spaces are for clarity only Advance page ESC K advances to next page Back page ESC J displays previous page Print page and ESC P sends current page data display next page to the printer a
59. r to the protected field If the whole screen is protected the cursor will go to the HOME position and will not move Protect mode affects cursor action during tabulating ed iting sending and printing 4 8 3 Procedure Using Protect mode is actually a two step process input and protection 4 8 3 1 Input Individual areas fields which will be given blanket pro tection from later change are created using Protected Writing lt 1 Information must be input using this procedure if it is to be protected later a To start Protected Writing position the cursor where the first protected character is to be located b Enter ESC This turns on the Write Protect mode also called Half Intensity Until the mode is reset each char acter entered is displayed at half intensity c Enter the information for that area of the screen d Proofread the entry and change if necessary e End data entry in that area by entering ESC This turns off the Protected Writing mode f Move the cursor to the next area to be protected and repeat 4 8 3 2 Protection When all areas to be protected have been entered cor rectly the whole screen is ready to be protected from change Protect ON Once this protection is given the cursor will not be able to enter those areas unless the protection is removed To start Protect mode enter ESC amp lt A The position of the cursor is irrelevant during this es cape sequence
60. s Clear all data to nulls ESC Clears all data on the page to nulls and resets the Half Intensity and Protect modes 4 10 SEND FUNCTION Once data or text has been entered and edited it may be transmitted to the computer by either pressing SEND or by entering a control sequence to send specific data To send the computer specific data type the code in the exact sequence shown in the following send descriptions 4 10 1 Send Line Unprotected ESC 4 Sends all unprotected data on a line from column 1 through the cursor position The code also sends field delimiters in place of protected fields and an end of text character at the end of the send transmission 4 10 2 Send Page Unprotected ESC 5 Sends all the unprotected data on page from Home through the cursor position It sends field delimiters in place of protected fields The code also sends a line de limiter at the end of a line and an end of text character at the end of the send transmission 4 10 3 Send Line All ESC 6 Sends all data from the first column through the cursor position It also sends the start protected field and end protected field delimiters at the start and end respec tively of each protected field If the character at the cur sor position is protected the 925 sends an end protected field to the computer The code sends the end of text character at the end of the send transmission Nis aN If the data to be sent includes attribute charac
61. ses all characters from the cursor position to the end of the line or the end of an unprotected field and replaces them with null characters If Half Intensity is on the erased characters are replaced with half intensity null characters Erase to End of Page ESC Y Replaces unpro tected characters from the cursor position to the end of the page with spaces If Half Intensity is on erased characters will be replaced with half intensity spaces Erase to End of Page with Nulls ESC y Erases all unprotected characters from the cursor position to the end of the page and replaces them with null characters If Half Intensity is on erased characters are replaced with half intensity null characters 4 9 2 4 Clear Function The Model 925 clear function is used in one of four ways to clear data from screen memory and or computer memory The clear function escape codes and a descrip tion of their functions follow 20 e Clear unprotected to nulls ESC Clears all un protected data on the page to the null character or half intensity nulls if set Clear unprotected to insert character ESC or ESC or CTRL Z Clears all unprotected data on the page to the insert character The insert char acter is a space by default If Half Intensity H I is set the screen will be cleared to half intensity insert characters Clear page to half intensity spaces ESC Clears all unprotected data on the page to half intensity space
62. stem 8 See Chapter 6 Troubleshooting and Repair for help if the installation does not proceed smoothly 3 3 KEYBOARD CONTROLS In addition to standard alphanumeric typewriter keys your terminal has several keys which perform special op erations These special keys can be used in conjunction with your computer to allow e Modifying action of other keys e Editing Entering preprogrammed data Each key on the keyboard is actually a switch Some times two keys can be used together to provide a totally different message to the computer CTRL or SHIFT When used together these keys control the generation of data sent to the computer system and the receipt and printing of information 3 3 1 Keyboard Layout Figure 3 1 illustrates the keyboard layout Refer to Ta ble 3 1 where each key s function is described in detail This table is subdivided by types of functions and gives information on the effect of each key and commands For detailed information refer to Table 3 1 Figure 3 1 Model 925 Keyboard Layout 7 Key Name Space Bar SHIFT ALPHA LOCK TAB BACK TAB CTRL Control ESC Escape TABLE 3 1 FUNCTION OF KEYS Repeat Transmitted Action Description Yes No Yes No 2 Z lt Z Z lt e Causes a blank space to appear on the display and transmits an ASCII space code 20 Hex Selects upper character inscribed on a key changes operation of most special keys a
63. ters these will be sent too the 925 will automatically include the suitable escape seguences This also applies to any attribute characters encountered on the screen 4 10 4 Send Page All ESC 7 Sends all data on the page from Home through the cursor position It also sends the start protected field delimiters at the start and end respectively of each protected field If the character at the cursor position is protected the 925 sends an end protected field delimiter to the com puter This code also sends the end of text character at the end of the send transmission 4 10 5 Send Message Unprotected ESC S Sends all unprotected data bracketed by the state of text STX and end of text ETX codes displayed on a page After the data is sent the 925 positions the cursor at the ETX code If the page contains no STX codes transmis sion begins from Home If the page contains no ETX code the 925 sends to the end of the page and positions the cursor at Home after the data is sent If the page contains neither an STX nor an ETX code the entire page will be sent The code sends field delimiters in place of protected fields It also sends line delimiters at the end of each line and an end of text delimiter at the end of the send transmission 4 10 6 Send Message All ESC s Operates in the same manner as ESC S except that pro tected fields delimited by start protected field and end protected field are also transmitted 4 11 T
64. the computer 28 Half Duplex In half duplex communication the terminal transmits and receives data in separate consecutive operations Transmitted data is printed locally Handshaking A communications protocol which is necessarily used when the transmitting speed of the computer is faster than the printing speed of the terminal It consists of a set of commands recognized by both stations which control the flow of the data transmission from the computer Hardware The electronic components of a computer system or terminal Host The computer system Interface A communications channel which is typically used for external devices Main The computer system Memory That part of a computer system or terminal where infor mation is stored Microprocessor An electronic circuit on the surface of a small silicon chip which can be programmed to perform a wide variety of functions within the computer system or terminal Modem An electronic device which converts modulates the se rial communications between the computer and terminal into audible tones which can be transmitted over tele phone lines All received data is reconverted demodu lated from the audible tones into serial information NUL An ASCII code nothing which is used as a fill char acter in some communications formats Parity A method of checking for errors in data communica tions An extra bit either a 1 or 0
65. the Protect mode off it will cause a scroll if the cur sor is at column 80 of the last line With Auto Page on and the cursor at the last unprotected position on the page the cursor will advance to the first unpro tected position of the next page If the page is the last the cursor will advance to Home of the first page With Auto Page off the Protect mode on and the cursor at the last unprotected position on the page the cursor will move to the first unprotected position of the current page 19 e Carriage return CTRL M Moves the cursor left to column 1 of the current line Cursor Home CTRL A Moves the cursor to the first unprotected character on the page New line CTRL __ Causes the terminal to per form a carriage return and a linefeed 4 9 2 2 Normal and Reverse Linefeed The linefeed control code sequences and a description of their functions follow Linefeeds received by the Model 925 under certain conditions may result in the loss of data Read the fol lowing control code explanations carefully Linefeed CTRL J or LINEFFED With Auto Page and the Protect mode off a linefeed advances the cursor to the next line on the page If the cursor is at the bottom of the screen linefeeds cause the display to roll up one line for each linefeed If the cursor is also at the bottom of the page a linefeed causes a new line of data to appear at the bottom of the screen and results in the loss of the top li
66. the exact sequence shown below do not enter the spaces between the char acters spaces are for clarity only 4 23 Screen Off Attribute Code Not Displayed ESC 0 Blinking Block ESC 1 Steady Block ESC 2 Blinking Underline ESC 3 Steady Underline ESC 4 To blank the entire screen enter ESCO To return the screen to normal display enter ESC N 5 PREVENTIVE MAINTENANCE 5 1 CARE Tender loving care will prolong the useful life of your terminal Clean and inspect it periodically 5 1 1 Cleaning To clean the terminal exterior 1 Vacuum the keyboard every three months with a soft brush attachment or use a small soft brush 2 Clean the housing with a soft lint free cloth and a commercial detergent every three months DO NOT use solvent based or abrasive cleaners 5 1 2 Inspection Description Frequency 1 Inspect the terminal cabinet for 1 Yr cracks or breaks 2 Check each key for free movement 1 Yr 3 Check the cable connector at the 1 Yr rear of the terminal cabinet for damage 6 TROUBLESHOOT ING AND REPAIR 6 1 TROUBLESHOOTING Your computer terminal is just one of several compo nents in the computer system A failure anywhere else in the system can cause the improper operation of the ter minal The computer system memory systems cables modems and operational procedures should be checked if there has been a malfunction Table 6 1 will be helpful in determining the cause of a problem If
67. this table does not help locate the cause of the problem run the self test or call a gualified service technician for assistance 6 1 1 Testing the Terminal Self Test You can test the terminal yourself to verify proper oper ation of the video display circuitry The test will display all displayable characters and all 16 video attributes in both half and full duplex To start the test enter SHIFT Setup 1 The display screen should now look like that in Figure 4 2 Look at the display carefully to verify that all char acters appear all video attributes appear correctly and all half intensity characters are shown Each character should be formed properly and you should not be able to see any extra dots and no dots should be missing Check the switch settings on the terminal against those on the display see Fig 4 2 The display will show the dip switches as a 1 up or a 0 down To stop the test press SHIFT BREAK BREAK Should your display not appear as pictured in Figure 4 2 call a qualified service technician 24 6 2 REPAIR Model 925 operator repair is limited to changing the line fuse and the two internal power supply fuses 6 2 1 Changing the Line Fuse To change the line fuse proceed as follows To avoid electrical shock disconnect the terminal power cord before changing the line fuse 1 Disconnect the terminal power cord from primary power 2 Remove the fuse holder see Figure 2 2 by
68. utlet 2 Did you set the power selector switch to match your power requirements 3 Is the main interface cable to the computer system properly wired and plugged in 4 Ifyou are using a printer did you plug in the printer interface connector 5 Did you set the switches for the correct e baud rate both for terminal and printer stop bits word structure parity 6 Did you set switches for e 50 or 60 Hertz to match your powerline freguency reguirements e full or half duplex 7 Did you plug the terminal in to the wall outlet If the answers are YES then you are ready to proceed with actually using the terminal 3 OPERATION 3 1 INTRODUCTION This chapter will lead you step by step through the op eration of the terminal Even if you have never used a computer terminal before you will be able to use the terminal easily if you read this chapter carefully If you are a programmer you will want to continue on to Chap ter 4 which covers additional information for program ming a computer to interface with your terminal During this chapter you will learn about Turning on and adjusting the terminal s display screen Using the various keys on the keyboard e Directing data to the computer system and the printer through send commands e Setting tabs e Changing visual attributes of the screen e Communicating with your computer system 6 3 2 TURNING ON THE TERMINAL 3 2 1 Rear Controls Sever
69. ways wear heavy rubber gloves or use tongs to pick up the bro ken CRT fragments since the coating on the inside of the tube is poisonous 2 Even after the power is turned off charges are re tained by the CRT and capacitors Always dis charge them to ground before touching them Never reach into the terminal enclosure unless someone capable of giving aid is present 1 5 PROTECT THE TERMINAL Although the terminal is packaged in a durable housing you can help protect it by observing two simple precautions 1 Take care to keep foreign objects such as paper clips or liquids off the keyboard 2 Use the terminal ona secure surface and don t drop the terminal or drop heavy objects onto it 2 INSTALLATION 2 1 INTRODUCTION This chapter will tell you how to unpack and check your terminal for damage check power and site require ments and set the power and interface configurations A brief checklist at the end will make sure you did not skip any part of the installation process Once your terminal is installed you will be ready to op erate the terminal and you will probably not need to use this chapter again unless you need to move the terminal reship it or use it with another computer system As you start the installation you will want to have some information about your computer system and its config uration requirements 2 2 UNPACKING AND INSPECTING THE TERMINAL 2 2 1 Shipping Damage Inspection After the t
70. will only reference the 925 commands 1 3 DESCRIPTION OF TERMINAL A brief overview of the capabilities of your terminal will help you take advantage of its features as you use it The Model 925 operates in Block or Conversational modes HDX FDX Baud rates can be set at any of 15 speeds from 50 to 19 200 bps Depending on switch settings the 925 will emulate Tele Video s 912 and 920 terminals Character sets can be changed to English Spanish German or French Visual attributes can be set a line at a time or a page at a time either alone or in combination You can set the display to monitor the computer program to facilitate program debugging Printing is easily controlled with a special PRINT key Using the FUNCT key with any alpha or numeric key allows you to quickly transmit the key selected bracketed by SOH and a CR To create custom applications you can easily substitute a ROM with twice as much space The keyboard is a Selectric style which includes a ten key pad and 22 function keys for easy data entry 1 4 PROTECT YOURSELF When you install or test the terminal observe standard safety precautions as you would with any electrical or electronic equipment Only qualified service personnel should open the terminal housing Disconnect all power before performing any inspection or maintenance Beyond the normal precautions you should be aware of two additional conditions 1 If the CRT tube should be broken al
71. wn in Tables 2 3 and 2 4 al lows you to preset the terminal to operate in any of sev eral optional conditions Baud Rates You can select any of 15 baud rates according to the re quirements of your computer system Character Sets You can select English French German or Spanish character sets Refer to Table 2 4 Hertz You can set the Hertz switch to match your powerline frequency Parity Stop Bits Word Structure You can set the parity number of stop bits and number of data bits in the word structure to match the require ments of your computer system Signals You can connect disconnect Data Set Ready Data Car rier Detect and Data Terminal Ready See Table 2 4 Power Supply Logic Board Connector P 5 Video Monitor Connector P 2 Video Monitor Power Supply Fuses TREE S EERI TEE VENEER SPP ENC TESNY Figure 2 3 Terminal Interior Shift Clock Keyboard UART RS232 Printer UART System ROM CPU CRT Controller Character Generator Page 1 Display RAM E3 E4 Page 2 Display RAM E1 E2 Power Supply Connector Monitor Connector P2 Pin 3 P2 Pin 6 Switch S3 Switch S2 Switch S1 E5 E6 E7 Keyboard E10 E11 Printer E14 E15 E16 RS232 Port Connector Port Figure 2 4a Logic Board Part No 001 5b E11 E7 E9 Switch 1 Modem Connector Main and Printer Port UART Keyboard UART Power Supply Connector System RAM E14 E10 Chassis Main Port Character

Te/eVideo® Model925 and User's Guide

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Te/eVideo&reg; Model925 and User's Guide

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Te/eVideo® Model925 and User's Guide