DUOCOM: USER MANUAL
Contents
1. Page 5 Technical Description Installation Operating System Installation For Windows Users Start by choosing Install Software at the beginning of the CD Choose Asynchronous COM Port Software SeaCOM Other Operating Systems Refer to the appropriate section of the Serial Utilities Software System Installation The DUOCOM can be installed in any of the PC expansion slots but to access the AT or E ISA IRQs 10 15 it must be installed in one of the 16 bit slots The DUOCOM contains several jumper straps for each port which must be set for proper operation prior to installing the adapter into the computer BRA 5 6 7 Turn off PC power Disconnect the power cord Remove the PC case cover Locate an available slot and remove the blank metal slot cover Gently insert the DUOCOM into the slot Make sure that the adapter is seated properly Replace the screw Replace the cover Connect the power cord Installation is complete Sealevel Systems DUOCOM Page 6 Technical Description Technical Description The DUOCOM utilizes the 16550 UART This chip features programmable baud rate data format interrupt control and a 16 byte input and output FIFO Also available as an option is the 16C650 UART that provides a deeper FIFO 32 bytes and enhanced clocking features Features e Addressable as COMI COM4 and other selectable address combinations e Shareable IRQs allow more than one p2. 3 2 inches 8 13 cm Sealevel Systems DUOCOM Page 8 Appendix A Troubleshooting Appendix Troubleshooting Serial Utility test software is supplied with the Sealevel Systems adapter and will be used in the troubleshooting procedures By using this software and following these simple steps most common problems can be eliminated without the need to call Technical Support 1 Identify all I O adapters currently installed in your system This includes your on board serial ports controller cards sound cards etc The I O addresses used by these adapters as well as the IRQ if any should be identified Configure your Sealevel Systems adapter so that there is no conflict with currently installed adapters No two adapters can occupy the same I O address Make sure the Sealevel Systems adapter is using a unique IRQ The IRQ is typically selected via an on board header block Refer to the section on Card Setup for help in choosing an I O address and IRQ Make sure the Sealevel Systems adapter is securely installed in a motherboard slot When running DOS Windows 3 x or other operating systems refer to the Serial Utilities software for that operating system and the User Manual to verify that the Sealevel Systems adapter is configured correctly The supplied software contains a diagnostic program SSD that runs under DOS and will verify if an adapter is configured properly This diagnostic program is written with the user in m
3. Hex If a COM amp COM2 are already present use the second addressing option this will provide the typical addresses for COM3 amp COM4 Refer to Appendix A for common address contentions Sealevel Systems DUOCOM Page 2 Card Setup IRQ Selection Headers E1 and E2 select the interrupt request for each serial port E1 Port 1 E2 Port 2 If COM1 is selected the corresponding jumper must be on the IRQ4 setting If COM2 is selected the corresponding jumper must be on IRQ3 Note Most communications software applications default COM3 to IRQ4 and COM4 to IRQ3 This requires the sharing of interrupts between COM and COM3 and between COM2 and COM4 While this is the default it is not always the preferred setting Check your software configuration instructions to determine the most appropriate IRQ selection ig 2 9 3 4 5 7 10111215 E2 Bee tig 2 93 4 5 7 10111215 Figure 2 Header E1 and E2 IRQ Selection Any two or more ports can share a common IRQ by placing the jumpers on the same IRQ setting and setting the appropriate selections at E3 Consult your particular software for IRQ selection If no interrupt is desired remove the jumper Sealevel Systems DUOCOM Page 3 Card Setup Interrupt Modes Header E3 selects the interrupt mode for each port Each port must be set in the correct mode to insure proper installation N indicates the N ormal single interrupt per port mode S In
4. DUOCOM USER MANUAL Part 3088 pe Ee Phone 864 843 4343 i 4 843 3067 P O Box 830 FAX 864 843 306 sealevel Liberty SC 29657 USA www sealevel com Contents BE AE Ed EE OE ts 1 WHAT SINC UDE suse 1 FACTORY DEFAULT SETTINGS erevrvvnnvrnsnvnnsnvensnnennvnnenvensnvensnnensvnesvvnssenen 1 CARD SETUP soes iese ses se see ee ed dese be ee dd ee be ge bo Ge Ge ee gee Ge be de gee be ADDRESS SELECTION ee ees ees ee ee ee ee ee ee ee ee ee ee ee ee ee 2 TRO SELECTION GE RA EG Ed Ge EE EG ER ee Ge Ge ee ee ge 3 INTERRUPT MODES ees sesse ese ee ee ee ee ee ee ee ee ee ee d INSTALLATION Geest SeSe ee oes ele o Ge Ge Gees ed cess cbssesseacssccscesccesceseO OPERATING SYSTEM INSTALLATION ccsccsscessceseesseesseessecseensceseenseens 6 For Windows Users esse ese ee ee ee ee ee ee ee ee ee 6 Other Operating Systems 00 ee se se see se Ge Ge Re Re Ge Ge Re Ge ee 6 SYSTEM INSTALLATION cccesscessesscesceseesscsecsscesceseceseenscessesseeesscaee 6 ENVIRONMENTAL SPECIFICATIONS cssscsscesscessesseensecesscseescsseenseens 8 MANUFACTURING serrer Seen ee Gee ees Ge ee eek eed ee Ge a sk ed ee 8 POWER CONSUMPTION ccscescesscssscsscesscesscesssessesecssscnscssecsssensceaaeessees 8 MEAN TIME BETWEEN FAILURES MTBF 0 ccscceseeseeeseeseeceseeeeees 8 PHYSICAL DIMENSIONG csssccsssccssccessccesseceessccecessceessecesscceseeceaeens 8 APPENDIX TROUBLESHOOTING cccccscsssc
5. anual are the service mark trademark or registered trademark of the respective company DUOCOM is a trademark of Sealevel Systems Incorporated Sealevel Systems DUOCOM Page 17
6. ces Appendix F Compliance Notices Federal Communications Commission Statement This equipment has been tested and found to comply with the limits for Class B digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures e Reorient or relocate the receiving antenna e Increase the separation between the equipment and receiver e Connect the equipment into an outlet on a circuit different from that to which the receiver is connected e Consult the dealer or an experienced radio TV technician for help Caution Sealevel Systems Inc is not responsible for any radio or television interference caused by unauthorized modifications of this equipment or the substitution of attachment of connecting cables and equipment other than those specified by Sealevel Systems Such unauthori
7. dicates the S hared interrupt mode which allows more than one port to access a single IRQ Any two or more ports can share a common IRQ by placing the jumpers on the same IRQ setting and setting the appropriate selections at E1 Consult your particular software for IRQ selection If no interrupt is desired remove the jumper R indicates the inclusion of a IK ohm pull down resistor required on one port when sharing interrupts a felle Figure 3 Header E3 Normal IRQ Mode Set the jumpers to S for shared interrupt mode on all blocks sharing an IRQ Also set one block for R This provides the pull down resistor circuit that makes sharing of IRQs possible If you are using more than one DUOCOM or a compatible adapter in a bus you should only have one port set to R The following example shows both ports sharing a single IRQ N_S O E O i gt R E3 1 2 Figure 4 Header E3 Shared IRQ Mode Sealevel Systems DUOCOM Page 4 Card Setup Set the jumper to S if you are using more than one DUOCOM in a bus or you wish to completely remove the pull down resistor for hardware compatibility Setting the adapter in this configuration when it is not accompanied by a pull down resistor will prevent the ports from triggering an interrupt N S 10 NEE Ed EE Figure 5 Header E3 Sharing IRQ s with another adapter Sealevel Systems DUOCOM
8. f possible If no cable is provided or if an alternate cable is required use high quality shielded cabling to maintain compliance with EMC directives Sealevel Systems DUOCOM Page 16 Warranty Warranty Sealevel Systems Inc provides a lifetime warranty for this product Should this product fail to be in good working order at any time during this period Sealevel Systems will at it s option replace or repair it at no additional charge except as set forth in the following terms This warranty does not apply to products damaged by misuse modifications accident or disaster Sealevel Systems assumes no liability for any damages lost profits lost savings or any other incidental or consequential damage resulting from the use misuse of or inability to use this product Sealevel Systems will not be liable for any claim made by any other related party RETURN AUTHORIZATION MUST BE OBTAINED FROM SEALEVEL SYSTEMS BEFORE RETURNED MERCHANDISE WILL BE ACCEPTED AUTHORIZATION CAN BE OBTAINED BY CALLING SEALEVEL SYSTEMS AND REQUESTING A RETURN MERCHANDISE AUTHORIZATION RMA NUMBER Sealevel Systems Incorporated 155 Technology Place P O Box 830 Liberty SC 29657 USA 864 843 4343 FAX 864 843 3067 www sealevel com email support sealevel com Technical Support is available from 8 a m to 5 p m Eastern time Monday Friday Trademarks Sealevel Systems Incorporated acknowledges that all trademarks referenced in this m
9. he Internet Our home page address is www sealevel com The latest software updates and newest manuals are available via our FTP site that can be accessed from our home page 4 Technical support is available Monday to Friday from 8 00 a m to 5 00 p m Eastern time Technical support can be reached at 864 843 4343 RETURN AUTHORIZATION MUST BE OBTAINED FROM SEALEVEL SYSTEMS BEFORE RETURNED MERCHANDISE WILL BE ACCEPTED AUTHORIZATION CAN BE OBTAINED BY CALLING SEALEVEL SYSTEMS AND REQUESTING A RETURN MERCHANDISE AUTHORIZATION RMA NUMBER Sealevel Systems DUOCOM Page 11 Appendix C Electrical Interface Appendix C Electrical Interface RS 232 Quite possibly the most widely used communication standard is RS 232 This implementation has been defined and revised several times and is often referred to as RS 232 or EIA TIA 232 The IBM PC computer defined the RS 232 port on a 9 pin D sub connector and subsequently the EIA TIA approved this implementation as the EIA TIA 574 standard This standard is defined as the 9 Position Non Synchronous Interface between Data Terminal Equipment and Data Circuit Terminating Equipment Employing Serial Binary Data Interchange Both implementations are in wide spread use and will be referred to as RS 232 in this document RS 232 is capable of operating at data rates up to 20 Kbps at distances less than 50 ft The absolute maximum data rate may vary due to line conditions and cable lengths RS 232 is a s
10. ind and is easy to use Refer to the DIAG txt file in the dos diag directory for detailed instructions on using SSD For Windows 95 98 and Windows NT the diagnostic tool WinSSD is installed in the Sealevel folder on the Start Menu during the setup process First find the ports using the Device Manager then use WinSSD to verify that the ports are functional Always use the Sealevel Systems diagnostic software when troubleshooting a problem This will help eliminate any software issues and identify any hardware conflicts Sealevel Systems DUOCOM Page 9 Appendix A Troubleshooting 8 The following are known I O conflicts e The 278 and 378 settings may conflict with your printer I O adapter e 3BO cannot be used if a Monochrome adapter is installed e 3F8 3FF is typically reserved for COM1 e 2F8 2FF is typically reserved for COM2 e 3E8 3EF is typically reserved for COM3 e 2E8 2EF is typically reserved for COM4 Sealevel Systems DUOCOM Page 10 Appendix B How To Get Assistance Appendix B How To Get Assistance Please refer to Appendix A Troubleshooting prior to calling Technical Support 1 Read this manual thoroughly before attempting to install the adapter in your system 2 When calling for technical assistance please have your user manual and current adapter settings If possible please have the adapter installed in a computer ready to run diagnostics 3 Sealevel Systems maintains a Home page on t
11. ingle ended or unbalanced interface meaning that a single electrical signal is compared to a common signal ground to determine binary logic states The RS 232 and the EIA TIA 574 specification define two types of interface circuits Data Terminal Equipment DTE and Data Circuit Terminating Equipment DCE The DUOCOM is a DTE device Sealevel Systems DUOCOM Page 12 Appendix D Asynchronous Communications Appendix D Asynchronous Communications Serial data communications implies that individual bits of a character are transmitted consecutively to a receiver that assembles the bits back into a character Data rate error checking handshaking and character framing start stop bits are pre defined and must correspond at both the transmitting and receiving ends Asynchronous communications is the standard means of serial data communication for PC compatibles and PS 2 computers The original PC was equipped with a communication or COM port that was designed around an 8250 Universal Asynchronous Receiver Transmitter UART This dewce allows asynchronous serial data to be transferred through a simple and straightforward programming interface Character boundaries for asynchronous communications are defined by a starting bit followed by a pre defined number of data bits 5 6 7 or 8 The end of the character is defined by the transmission of a pre defined number of stop bits usually 1 1 5 or 2 An extra bit used for error detection i
12. ith the following items If any of these items are missing or damaged contact the supplier e DUOCOM Serial I O Adapter e Serial Utility Software e User Manual Factory Default Settings The DUOCOM factory default settings are as follows Port Base Address IRO Port I 280 5 To install the DUOCOM using factory default settings refer to Installation on page 6 For your reference record installed DUOCOM settings below Port Base Address IRQ Port 1 Port Sealevel Systems DUOCOM Page 1 Card Setup Card Setup The DUOCOM contains several jumper straps which must be set for proper operation Address Selection Each serial port on the DUOCOM occupies eight consecutive I O locations and looks to the PC as a standard serial port A DIP switch SW1 is used to set the port address options for the DUOCOM Be careful when selecting the port addresses as some selections may conflict with existing ports The following table shows the addressing options available with the standard PAL If you do not see an address option that suits your needs please contact Sealevel Systems Technical Support about a custom PAL option 3E8 2F8 2F8 3220 3228 4220 4228 5220 4220 300 308 280 288 300 280 Disabled Disabled Figure I Address Selection Table Note Each COM port in your system should have a unique address Typically COMI COM4 addresses are 3F8 2F8 3E8 amp 2E8
13. ort to share a single IRQ e IRQs2 5 7 10 11 12 15 supported Connector Pin Assignments DB9 Male in Mode TD Transmit Data Output RTS Request To Send DTR Data Term Ready GND Ground Output Input Input Note These assignments meet EIA TIA ANSI 574 DTE for DB 9 type connectors RD Receive Data DCD Data Carrier Detect DSR Data Set Ready CTS Clear To Send RI Ring Indicator lelies Es IE Technical Note Please terminate any control signals that are not going to be used The most common way to do this is connect RTS to CTS and RI Also connect DCD to DTR and DSR Terminating these pins if not used will help insure you get the best performance from your adapter Sealevel Systems DUOCOM Page 7 Specifications Specifications Environmental Specifications Temperature Range 0 to 50 C 20 to 70 C 32 to 122 F 4 to 158 F Humidity Range 10 to 90 R H 10 to 90 R H Non Condensing Non Condensing Manufacturing e All Sealevel Systems Printed Circuit boards are built to U L 94V0 rating and are 100 electrically tested These printed circuit boards are solder mask over bare copper or solder mask over tin nickel Power Consumption Mean Time Between Failures MTBF Greater than 150 000 hours Calculated Physical Dimensions Board length 5 4 inches 13 72 cm Board Height including Goldfingers 3 5 inches 8 89 cm Board Height excluding Goldfingers
14. s often appended before the stop bits Idle state of Odd Even line H S to 8 Data Bits na ped sp 1 I FEET i er SPE I o Es es Edet se l es ret UI 1 5 04 ka 2 d Figure 6 Asynchronous Communications Bit Diagram This special bit is called the parity bit Parity is a simple method of determining if a data bit has been lost or corrupted during transmission There are several methods for implementing a parity check to guard against data corruption Common methods are called E ven Parity or O dd Parity Sometimes parity is not used to detect errors on the data stream This is refereed to as N o parity Because each bit in asynchronous communications is sent consecutively it is easy to generalize asynchronous communications by stating that each character is wrapped framed by pre defined bits to mark the beginning and end of the serial transmission of the character The data rate and communication parameters for asynchronous communications have to be the same at both the transmitting and receiving ends The communication parameters are baud rate parity number of data bits per character and stop bits i e 9600 N 8 1 Sealevel Systems DUOCOM Page 13 Appendix E Silk Screen Appendix E Silk Screen US NI SQW B8aoE 5 0 20L4 sp 74L5245 DN Ul O NW Z 9 KC 74LS244 gt 74L 126 No nn STN 5 4 2 Sealevel Systems DUOCOM Page 14 Appendix F Compliance Noti
15. scscssscscscscscscscscee D APPENDIX B HOW TO GET ASSISTANCE cccccscccccsccccsssseoee L APPENDIX C ELECTRICAL INTERFACE ccccccccscsccscsscssocees 12 APPENDIX D ASYNCHRONOUS COMMUNICATIONS 00066 13 APPENDIX E SILK SCREEN ccccscssscscscscscscscscscscscscssscscscscee 14 APPENDIX F COMPLIANCE NOTICES sesevevevevevevenenevenevenenever 15 FEDERAL COMMUNICATIONS COMMISSION STATEMENT ese ese 15 CANADIAN RADIO INTERFERENCE REGULATIONS ees sesse esse ese ee ee 15 EMC DIRECTIVE STATEMENT esse esse esse ees ees ee ee gee ee ee eg ee ee 16 Figure 1 Address Selection Table ssserenvevssereneervserenservsenenenevseneneneneenenenenee 2 Figure 2 Header E1 and E2 IRQ Selection esesesvesesvesessenesseneeneenesserenessenenr 3 Figure 3 Header E3 Normal IRQ Mode seseseevesesvenesvenessenesseenessenesessenessenene 4 Figure 4 Header E3 Shared IRQ Mode eseseevesesevvenesvenessenenseenessenessesenesseneer 4 Figure 5 Header E3 Sharing IRQ s with another adapter secsssere 5 Figure 6 Asynchronous Communications Bit Diagram eseecesereveserenveeeser 13 1999g Sealevel Systems Incorporated All rights reserved Introduction Introduction Overview The Sealevel Systems DUOCOM provides the PC with 2 Asynchronous serial ports providing a versatile interface for common RS 232 needs i e modem mouse and plotters What s Included The DUOCOM is shipped w
16. zed modifications substitutions or attachments may void the user s authority to operate the equipment The correction of interference caused by such unauthorized modifications substitutions or attachments will be the responsibility of the user Always use cabling provided with this product if possible If no cable is provided or if an alternate cable is required use high quality shielded cabling to maintain compliance with FCC directives Canadian Radio Interference Regulations This Class B digital apparatus meets all requirements of the Canadian Interference Causing Equipment Regulations Cet Appareil num rique de la classe B respecte toutes les exigences de R glement sur le mat riel du Canada Sealevel Systems DUOCOM Page 15 Appendix F Compliance Notices EMC Directive Statement Products bearing the CE Label fulfill the requirements of the EMC directive 89 336 EEC and of the low voltage directive 73 23 EEC issued by the European Commission To obey these directives the following European standards must be met EN55022 Class B Limits and methods of measurement of radio interference characteristics of information technology equipment EN55024 Information technology equipment Immunity characteristics Limits and methods of measurement ry EN60950 IEC950 Safety of information technology equipment including electrical business equipment Always use cabling provided with this product i
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