FP6120 User`s Manual
Contents
1. 14 PARTS PIS Tivececeescsecuneceeceetevevecanettetevers eo sen 16 Page i 1 1 Spare Time Gizmos OVERVIEW FP6120 User s Manual The FP6120 adds a traditional PDP 8 E style Programmer s Console to any SBC6120 system Twenty seven LEDS provide continuous display of the current memory address as well as memory or register contents and a additional LED displays the running or halted state of the processor Twelve data switches allow Figure 1 The SBC6120 Front Panel for direct entry of binary data and an additional eight switches provide program control functions including BOOT ADDRESS LOAD EXTENDED ADDRESS LOAD CLEAR CONTINUE EXAMINE DEPOSIT and HALT Figure 2 Complete SBC6120 FP6120 combination hanging on the wall The FP6120 is designed as a peripheral device which plugs into the standard SBC6120 expansion bus however because of its physical size the SBC6120 actually mounts directly to the back of the front panel Additional space is available on the back of the FP6120 to mount another I O board as well as either a CompactFlash memory card or a standard 2 laptop hard disk drive Finally the FP6120 contains a switching power supply which can supply all necessary power for the SBC6120 one or two daughter boards and the FP6120 itself from a single unregulated source of 9 to 12VDC The front panel fagade you see in these photos was profes2. The IOB6120 requires a hardware upgrade to work reliably with the FP6120 The last few IOBs assembled and sold by Jim already had this modification and if your IOB contains a 74HC373 part then yours should be OK If it contains a 74ACT373 however talk to Jim about the details of a fix e Early versions of the FPGA bit stream include an implementation of the PDP 8 switch register which will conflict with the FP6120 and prevent the front panel switches from working The latest version of the FPGA bit stream has the switch register removed and can be obtained from http www jkearney com sbc6120 i0b6120 htm Follow the instructions in Jim s IOB6120 manual for downloading new FPGA bits to the Flash ROM on the IOB6120 e Although the FP6120 works with any SBC6120 PLD version the IOB requires revision B or later of the IOT1 PLD Spare Time Gizmos is currently shipping revision of this part Contact Jim directly for more information on these IOB updates SBC6120 MODIFICATIONS SBC6120 Revision D PC boards require that a jumper be added to connect the LXMAR signal to pin 22 of the expansion connector Revision E and later PC boards incorporate this change and do not require modification The revision of your PC board can be found in the etch on the solder side underneath the IDE connector look for the words SBC6120 2x Copyright 200 Spare Time Gizmos The letter x after the SBC6120 2 is the revision of your board Figur
3. Spare lt Time Gizmos FP6120 SBC6120 FRONT PANEL USER S MANUAL First Edition Copyright 2003 by Spare Time Gizmos Visit our web site at www Spare TimeGizmos com Permission is granted to copy distribute and or modify this document under the terms of the GNU Free Documentation License Version 1 1 published by the Free Software Foundation with no invariant sections with the front cover text Portions Copyright O 2001 2003 by Spare Time Gizmos and our URL and with no back cover text A copy of this license may be obtained from http www gnu org licensesi fdl txt CONTENTS 1 3 A OVERVIEW ee thes teed ride Sorrir 1 1 1 REGULATORY WARNING csi ia rbd a 1 1 2 WARRANTY O dace EN 2 CONSTRUCTION iniciada 3 O IN NN 3 2 2 FIRMWARE NOTES ias rats 3 2 3 SBC6120 MODIFICATIONS rene eaaa a Dn i aiaia 3 2 4 PARTS SELECTION a oad EES e aAa 4 2 5 ASSEMBLY INSTRUCTIONS 2 2 a RE LIE 5 2 6 INSTALLING THE SBC6120 AND OTHER DAUGHTER BOARDS 9 OPERATION o E E inn 12 3 1 INDICATORS Henn ra TE 12 3 2 SWITCHES Aeneas eet ave LER NENNE ER ey ae 12 3 3 ROTARY SWITCH ee a Favela a aae a ete end ee 13 3 4 POWER AND PANEL LOCK 14 3 5 DIFFERENCES BETWEEN THE FP6120 AND THE 8
4. Time Gizmos FP6120 1D 1 FP6120 PC board revision E Spare Time Gizmos FP6120 FPK 1 FP6120 Faceplate Kit Spare Time Gizmos FP6120 LBK 1 FP6120 LED Aligner Spacer Bar Kit 1 24 Pin Machined Pin DIP Socket 0 300 3 20 Pin Machined Pin DIP Socket 6 16 Pin Machined Pin DIP Socket 2 14 Pin Machined Pin DIP Socket 1 8 Pin Machined Pin DIP Socket 5 4 40 1 2 round nylon M F spacers 5 4 40 1 4 nylon screws Table 4 FP6120 Parts List 10 24 2003 8 39 PM Page 17
5. on the PC board with 4 40 screws and serves two purposes First the LED bar serves as an aligner to keep the LEDs straight and lined up with the corresponding holes in the faceplate Second the bar isolates the LEDs so that the light from say the MA3 LED doesn t also leak out the opening for the MA2 or MA4 LEDs You can build your own LED bar or you can purchase a nicely milled and drilled one all ready to go directly from Spare Time Gizmos part number FP6120 LBK 2 4 3 The Faceplate The faceplate is a piece of 3 16 acrylic plastic approximately 8 Y by 15 silk screened with the front panel graphics and cut to clear the switches It mounts to the front panel PC board with eight 4 40 by 5 8 standoffs which are permanently attached to the faceplate You can purchase a faceplate separately from Spare Time Gizmos part number FP6120 FPK In the faceplate supplied by Spare Time Gizmos the graphics are screen printed with no less than five colors and five separate printing steps onto a 15 mil that s 0 015 polycarbonate film 10 24 2003 8 39 PM Page 4 2 5 Spare Time Gizmos FP6120 User s Manual In a separate step a 3 16 thick piece of acrylic is laser cut to size and drilled for the mounting holes The mounting hardware is then attached to the back of this panel and permanently glued into place In yet a third separate step a sheet of adhesive film is cut to size and then stamped with a custom made die to cut out ci
6. ANCE OF THE FP6120 OR YOUR RELIANCE ON THE FP6120 OR RESULTS FROM MISTAKES OMISSIONS INTERRUPTIONS DELETION OF FILES ERRORS DEFECTS DELAYS IN OPERATION OR TRANSMISSION OR ANY FAILURE OF PERFORMANCE WHETHER BASED ON CONTRACT TORT STRICT LIABILITY OR OTHERWISE EVEN IF SPARE TIME GIZMOS HAS BEEN ADVISED OF THE POSSIBILITY OF DAMAGES BECAUSE SOME STATES JURISDICTIONS DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES THE ABOVE LIMITATION MAY NOT APPLY TO YOU IN NO EVENT SHALL SPARE TIME GIZMOS LIABILITY IN THE AGGREGATE EXCEED THE SUMS ACTUALLY PAID BY YOU TO SPARE TIME GIZMOS AND ACCEPTED BY SPARE TIME GIZMOS FOR THE USE OF THE FP6120 10 24 2003 8 39 PM Page 2 2 1 2 2 2 3 Spare Time Gizmos FP6120 User s Manual CONSTRUCTION If you haven t already then please read the Assembly section of the SBC6120 User s Manual before reading this Many of the points made there particularly the section on Sockets and Soldering apply equally well to the FP6120 ERRATA There are no known errors in Revision D of the FP6120 board FIRMWARE NOTES The FP6120 requires that your SBC6120 have BTS6120 v266 or later This version may be downloaded from the Spare Time Gizmos web site if you need to upgrade your EPROMs The FP6120 does not require any changes to the SBC6120 PLDs If you intend to use the FP6120 with Jim Kearney s IOB6120 there are more issues you should be aware of
7. E SUITABILITY OF THE FP6120 FOR ANY APPLICATION IT IS SOLELY AND EXCLUSIVELY YOUR RESPONSIBILITY TO EVALUATE THE ACCURACY COMPLETENESS AND USEFULNESS OF THE FP6120 AND ALL RELATED DESIGNS SOFTWARE AND OTHER INFORMATION PROVIDED BY SPARE TIME GIZMOS THE ENTIRE RISK AS TO THE USE AND PERFORMANCE OF THE FP6120 IS ASSUMED SOLELY BY YOU NO REPRESENTATION OR OTHER AFFIRMATION OF FACT INCLUDING BUT NOT LIMITED TO STATEMENTS REGARDING CAPACITY PERFORMANCE OF PRODUCTS OR SUITABILITY FOR USE WHETHER MADE BY SPARE TIME GIZMOS EMPLOYEES OR OTHERWISE WILL BE DEEMED TO BE A WARRANTY FOR ANY PURPOSE OR GIVE RISE TO ANY LIABILITY ON THE PART OF SPARE TIME GIZMOS THE WARRANTIES AND CORRESPONDING REMEDIES AS STATED IN THIS SECTION ARE EXCLUSIVE AND IN LIEU OF ALL OTHERS WRITTEN OR ORAL SOME JURISDICTIONS DO NOT ALLOW THE EXCLUSION OF IMPLIED WARRANTIES SO THE ABOVE EXCLUSION MAY NOT APPLY TO YOU THE LIMITED WARRANTIES AND CONDITION REFERENCED ABOVE GIVE YOU SPECIFIC LEGAL RIGHTS YOU MAY HAVE OTHERS WHICH VARY FROM JURISDICTION TO JURISDICTION IN NO EVENT SHALL SPARE TIME GIZMOS OR ITS EMPLOYEES BE LIABLE FOR ANY COSTS OR DIRECT INDIRECT PUNITIVE INCIDENTAL SPECIAL CONSEQUENTIAL DAMAGES OR ANY OTHER DAMAGES WHATSOEVER INCLUDING WITHOUT LIMITATION DAMAGES FOR COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES LOST PROFITS LOSS OF DATA INTERRUPTION OF BUSINESS OR LOSS OF USE ARISING OUT OF OR IN ANY WAY CONNECTED WITH THE USE OR PERFORM
8. T switch down while pressing CONTinue which is exactly the same method used by the SBC6120 FP6120 Because of the missing key switch and SINGle STEP switch the switches on the FP6120 have been re arranged slightly to keep the panel balanced In particular the LOAD ADDRess and EXTendeD ADDRess LOAD switches have been moved from the right side of the switch register to the left 10 24 2003 8 39 PM Page 15 Spare Time Gizmos FP6120 User s Manual A PARTS LIST U1 U2 74HC373 JDR 2 Octal D Tri State Latch U3 U4 74HC174 JDR 2 Hex D flip flop U5 U6 74HC366 or 368 JDR 4 Hex Tri State Inverting Buffer U9 U10 either the 74HC366 or 74HC368 may be used U7 Atmel ATF22V10B15PC Arrow 1 CMOS PLD Flash U8 7555 JDR 1 CMOS Timer may be TLC555 U11 74HC74 JDR 1 Dual D flip flop U12 74HC05 JDR 1 Hex Open Drain Inverting Buffer U13 Atmel ATF16V8B15PC Arrow 1 CMOS PLD Flash REG1 TI PT78HT205H Digikey PT78HT205H 1 5V 2A Switching Regulator 3 pin SIP Horizontal Can use PT78HT305H for extra current D1 1N5820 Digikey 1N5820GICT 1 Schottky Diode 3A 20V DO 201 D2 1N5339 Digikey 1N5339BMSCT 1 Zener Diode 5 6V 5 5 0W T 18 F1 Littelfuse 473 003 Digikey F1204CT 1 3A picofuse R1 Digikey BC10 0KXCT 1 10 0K 1 1 8W carbon resistor R2 Digikey BC17 4KYCT 1 17 4K 1 1 8W carbon resistor R3 R4 2 10K 5 1 8W carbon resistor RP1 RP2 Digikey 4310R 1 561 2 560 ohm 10 Pin SIP Resistor RP3 RP4 Digikey 4308R 1 561 2 560 ohm 8 Pin SIP Resist
9. This action is equivalent to the BTS6120 TR or SI commands Lifting the DEPosit switch it is upside down from the other spring loaded switches will deposit the contents of the switch register into the memory location addressed by the program counter After the data is deposited the program counter is incremented the MEMORY ADDRESS LEDs are updated and if the rotary switch is set to the MD position the contents of the new location are displayed Table 2 Front Panel Switches ROTARY SWITCH This four position rotary switch designates which of four possible registers are displayed on the adjacent twelve DATA LEDs MD MOQ The DATA LEDs display the contents of the memory location indicated by the MEMORY ADDRESS and EMA displays The DATA LEDs display the contents of the Multiplier Quotient register 10 24 2003 8 39 PM Page 13 3 4 3 5 Spare Time Gizmos FP6120 User s Manual AC The DATA LEDs display the contents of the Accumulator FLAGS The DATA LEDs display the current processor flags as follows Bit 0 ON if the LINK bit is set Bit 2 ON if an INTerrupt REQuest is asserted Bit 4 ON if interrupts are enabled Bits 6 8 Displays the current contents of the instruction field register Bits 9 11 Displays the current contents of the data field register Table 3 Rotary Switch Positions POWER AND PANEL LOCK SWITCHES If the Power switch S1 and Panel Lock switch PLOCK are mounted on the PC board then they will be
10. anual OPERATION INDICATORS The FP6120 contains a total of twenty eight LED indicators These indicators provide a continuous display of the memory address memory data and the contents of several internal processor registers as described in table Table 1 MEMORY Displays the currently addressed memory location while the processor is ADDRESS running the contents of the program counter when the processor stops and the address of the location corresponding to the memory data displayed when the rotary switch is set to the MD position EMA These LEDs are unused in conjunction with the MEMORY ADDRESS LEDs to display a full fifteen bit memory address DATA These twelve LEDs can display either the contents of the memory location indicated by the MEMORY ADDRESS and EMA LEDs or the contents of the internal processor accumulator or multiplier quotient registers or the processor status flags as selected by the position of the rotary switch RUN This LED is ON when the processor is executing a main memory program and it is OFF when BTS6120 has control Table 1 Front Panel Indicators SWITCHES The FP6120 contains a total of twenty paddle switches for memory modification program control and data entry functions Most switches are effective only when the RUN LED is OFF i e BTS6120 is in control and only the switch register SRO SR11 the rotary switch and the HALT switch are enabled when the RUN LED is ON Table 2 describes the functio
11. ches it s possible to remove the paddles from them and install them on the corresponding ON NON MOM rocker switches V6 refers to the PCB mount frame used The V61 frame is for our purposes identical and will work without problems The V3 and V31 frames are similar but with different mounting hole spacing however the FP6120 PC board contains extra holes so that the V3 and V31 frames will also fit without problems The V2 and V21 V4 and V41 V7 V8 and V9 frames will all fit the PC board however these frames are different heights and will not mate properly with the plastic front panel faceplate B refers to the contact material gold in this case which is unimportant as far as mechanical concerns go The only other one you re likely to see is Q silver The final 1 at the end of the P N is the actuator color 1 is White 2 is Black and 3 is Red Naturally this makes to mechanical difference but for example you might not like the way a row of all red switches looks Finally C amp K is not the only possible switch source Other manufacturers such as NKK E Switch CTS etc make switches that are generally compatible with their C amp K counterparts These manufacturers usually have some sort of cross reference guide to help you find equivalent part numbers 2 4 2 The LED Bar The LED Bar is a piece of plastic approximately 12 4 x1 1 and 5 8 thick with holes drilled in it for every LED It mounts solder in swage standoffs placed
12. e 3 shows the proper way to modify a revision D PC board Carefully count the pins on the bus connector to locate pin 22 and then count down four more pins to locate the trace that connects U8 pin 23 to U5 pin 34 This trace is LXMAR and you need to solder a short jumper from it to pin 22 of the bus connector Since pin 22 was previously unused no other traces need to be cut Figure 3 Spare Time Gizmos is currently shipping Revision E of the SBC6120 LXMAR Jumper PC boards These boards and later ones already incorporate this 10 24 2003 8 39 PM Page 3 2 4 Spare Time Gizmos FP6120 User s Manual connection and do not require modification PARTS SELECTION 2 4 1 Finding Compatible Switches The FP6120 is designed to use C amp K P N 7101J60V6BE1 ON NONE ON and 7108J60V6BE1 ON NONE MOM SPDT PCB mount paddle switches It s certainly possibly to find exact matches for these part numbers however there are a number of other switches that can also be used It s handy to understand something about the C amp K nomenclature so you can figure out possible substitutions J60 is the actuator style in this case a 0 460 wide lever Other styles in the same width such as the J1 J15 or J50 rockers will fit the PC board but probably won t work with the plastic front facade It s also worth nothing that the actuators are interchangeable between the C amp K paddle and rocker switches so if you have a cheap source for ON NONE ON paddle swit
13. ht bar from the front Be sure to get the polarity right the long lead goes to the hole marked with a on the silk screen A two pin wire wrap header for replacing the one on the SBC6120 board is included in the FP6120 full kit 10 24 2003 8 39 PM Page 8 2 6 Spare Time Gizmos FP6120 User s Manual After you ve installed a few LEDs carefully so that they don t fall out flip the PC board over and lay it upside down on the workbench so that it is resting on the LED bar From the solder side push the LEDs down until the LED face is pressing against the bench this will ensure that the face of each LED is exactly flush with the surface of the bar Solder one lead on each LED flip the assembly over and double check that everything is positioned properly When you re satisfied with the LED position solder the other leads and then repeat this procedure for another group of LEDs Continue until all 26 are installed Figure shows a picture of the FP6120 with the LED bar LEDs and other small components installed Notice that the LEDs are flush with the LED bar be especially careful that the LEDs do not protrude beyond the face of the LED bar because they might crack the plastic faceplate when it is installed 2 5 6 Switches Install the paddle switches next SRO thru SR11 and HALT are action ON NONE ON switches and the rest are all momentary The momentary switches should be installed so that thei
14. layed on the DATA LEDs Pressing the CLEAR switch clears the internal processor registers including the AC MQ IF DF LINK SP1 and SP2 It also initializes all peripheral devices by executing the equivalent of a CAF Clear All Flags instruction Note that the CLEAR switch does not change the contents of the program counter Pressing the CONTinue switch starts the main memory program running at the location contained in the program counter All processor registers retain their original contents This switch is exactly equivalent to the BTS6120 c command The RUN LED is turned on by this switch Pressing the EXAMine switch increments the program counter and then displays the new address on the MEMORY ADDRESS LEDs If the rotary switch is set to the MD position then the contents of this location will be displayed on the DATA LEDs NOTE The EXAMine switch always increments the PC regardless of the rotary switch setting however the memory data can be displayed only if the rotary switch is set to MD Flipping the HALT switch down causes the main memory program to stop execution and control returns to BTS6120 The RUN LED is turned off Flipping the HALT switch up allows the main memory program to continue however it does not actually start the main memory program running until the CONTinue switch is pressed Pressing the CONTinue switch while the HALT switch is down executes a single instruction each time the CONTinue switch is pressed
15. mbled FP6120 PC board The outline of the LED bar is shown and the seven swage standoffs used for mounting the LED bar are circled These standoffs are all mounted with their threaded parts on the front component side of the PC board and are soldered on the back solder side Figure 4 also shows the eight mounting holes used by the faceplate assembly These holes do not use swage standoffs Figure 5 shows the solder side of the same FP6120 PC board and the outlines of the SBC6120 board the I O board the CompactFlash adapter and the IDE disk drive The colored circles indicate the corresponding mounting holes for each device The SBC6120 and I O board each use five swage standoffs and in this case the standoffs are installed with their threaded part on the solder side of the PC board and are soldered on the component side 10 24 2003 8 39 PM Page 6 Spare Time Gizmos FP6120 User s Manual Figure 5 Mounting Holes Solder Side 2 5 2 Small Components Mount the small components such as the IC sockets resistors capacitors the voltage regulator REG1 next Above all do not mount the LEDs switches or connectors now All the resistor packs used are the type that has one common pin Be sure to mount them with the common pin as 1 which is indicated by a square pad on the PC board You ma wish to socket RP1 thru RP4 if you want to change them later to adjust the LED current RP5 thru RP8 are always 4 7K and
16. mount with the female part on the component side of the PC board The stacking pins should extend thru the solder side and you solder it normally on the solder side Try to keep the solder down around the pads when soldering this connector and don t get any solder on the ends of the pins J5 is a two pin female header which mates with the console CPREQ header on the SBC6120 That s the two pin header immediately to the right of the HD6120 CPU chip J5 should be installed on the back side of the front panel PC board You may also need to replace the header on the SBC6120 with one that has longer pins the wire wrap style are plenty long to ensure that it makes connection with 05 Having said that be sure that the pins aren t too long you could crack the PC board when you tighten the mounting screws on the SBC6120 In particular if you do you replace the header on the SBC6120 with a wire wrap version the pins will be way too long The best procedure is to insert the wire wrap header in the SBC6120 PC board without soldering it you can use tape to hold it in place and then temporarily mount the SBC6120 on the back of the FP6120 PC board see section 0 You can push the pins on the wire wrap header thru the SBC6120 PC board until the correct length is achieved Then solder them remove the SBC6120 from the FP6120 and cut off the excess pin length Don t confuse J5 with JP2 the SLU Break Enable jumper on the front panel PC board JP2 is clo
17. n of each switch SRO These switches can be used to enter twelve bits of data directly into the PDP 8 program They be read by the standard OSR or LAS instructions SR11 These switches are also used in conjunction with other front panel switches to load memory addresses data or flags BOOT Pressing this switch twice executes the default bootstrap which searches for a valid boot block on the ID and VM devices This action is exactly equivalent to typing the BTS6120 B command without arguments NOTE The BOOT switch must be pressed twice without any other intervening switch or command to take effect ADDR Pressing the ADDRess LOAD switch loads the contents of the switch register LOAD into the program counter The address is displayed on the MEMORY ADDRESS LEDs and if the rotary switch is set to the MD position the contents of the corresponding memory location is displayed on the DATA LEDs 10 24 2003 8 39 PM Page 12 3 3 EXTD ADDR LOAD CLEAR CONT EXAM HALT DEP Spare Time Gizmos FP6120 User s Manual Pressing the EXTendedD ADDRess LOAD switch loads the contents of switch register bits 6 8 into the instruction field register and switch register bits 9 11 into the data field register The remaining bits of the switch register are ignored The EMA LEDs will display the new instruction field and if the rotary switch is set to the MD position the contents of the corresponding memory location is disp
18. or RP5 RP6 Digikey 4308R 1 472 2 4 7K ohm 8 Pin SIP Resistor RP7 Digikey 4310R 1 472 1 4 7K ohm 10 pin SIP Resistor RP8 Digikey 4306R 1 472 1 4 7K ohm 6 pin SIP Resistor C1 Digikey 399 1429 1 1uF 25V radial lead tantalum capacitor C2 C7 Digikey 399 1906 2 Unused 0 01uF 10VDC Mono ceramic capacitor C8 Digikey 1 100uf 25V radial lead aluminum electrolytic C9 C10 C11 C12 C13 C14 C15 C16 C18 C19 12 0 1uF 50V mono ceramic capacitor 0 1 lead spacing C20 C21 J1 Comm Con 1184 5062 STG 1184 5062 1 50 pin Male Female Stackable connector J2 Comm Con 1185 506 STG 1185 50G 1 50 pin Female connector 10 24 2003 8 39 PM Page 16 Spare Time Gizmos FP6120 User s Manual J3 CUI Stack PJ 102AH Digikey PJ 102AH PCB Mount Jack 2 1 x 5 5mm High Current J4 2 pin male header see section 2 5 4 J5 2 pin female header see section 2 5 4 JP1 JP2 Jameco SMHO2 2 2 pin header Jumper FB1 FB2 2 Ferrite Bead 0 400 Lead spacing S1 PLOCK T101MH9ABE Digikey CKN 1067 2 SPDT Tiny Toggle Switch PCB Mount Right Angle C amp K 7101J60V6BE1 13 SPDT PCB mount paddle switch ON NONE ON C amp K 7108J60V6BE1 7 SPDT PCB mount paddle switch ON NONE MOM Lorlin 10WA346 Mouser 10WA346 1 3 pole 4 position PCB mount rotary switch Kingbright L53ID Mouser 604 L53ID 28 Red LED T1 3 4 high efficiency Keystone 8555 Digikey 8555K 1 Knob round 0 7 diameter Keystone 1560A Mouser 534 1560A 20 4 40 solder in stand offs 0 125 high 0 250 diameter Spare
19. r toggles point upward in the rest position that is you should push their levers down to activate them The sole exception to this rule is the DEP switch which by tradition is installed upside down so that you have to ift the paddle to activate it Before installing the rotary switch you will need to cut the shaft to a length of approximately 0 400 as measured from the top of the threaded sleeve To improve the front panel clearance remove the lock washer from the shaft of the rotary switch Do not remove the tang washer that s the washer with the little finger on it and be sure to replace the nut after removing the lock washer it prevents the tang washer from falling out The tang washer limits the rotation of the switch to four positions so if you do accidentally remove the tang washer be sure to replace it with the finger in the hole marked 4 Notice that the rotary switch has a small round plastic post on the top surface that serves as a key This key is shown on the PC board silk screen and should be about the 2 o clock position when the switch is correctly installed Clearance for the rotary switch is limited so be sure it is absolutely flat against the PC board when you install it At first solder only two terminals on opposite sides of the switch and then use your soldering iron to re melt the solder on those two terminals while you press the switch down against the PC board with your other hand Visually inspect it to make
20. rcular openings in the exact size and position of the LED windows Now those three separate pieces the film with the graphics the adhesive and the 3 16 panel are all laminated together into a single piece and finally the entire thing is laser cut again for the switch openings One nice feature of process is that the faceplate is all one piece when you get it so there s no complex assembly required on your part like aligning and sandwiching a film between two sheets of plastic Another nice feature is that the silkscreen is actually printed on the back side of the polycarbonate film so that when it s assembled all the printing is protected from wear and scratches by the 15 mil thick film And finally this style of assembly hides leaves the heads of the mounting screws hidden beneath the film so there s nothing to mar the faceplate graphics 2 4 4 Integrated Cir cuits Either the 74HC366 or 74HC368 Hex Inverting Tri State buffer may be used in this circuit The 7555 CMOS timer is known by many different part numbers depending on the manufacturer The actual 7555 part number is used by Harris Intersil however the TLC555 manufactured by Texas Instruments is also quite common The Power Trends now part of Texas Instruments switching regulator is available in either a 2A 10W version the PT78HT205H or a 3A 15W version the PT78HT305H Either one will fit the PC board and you may wish to use the 3A 15W device if you plan to also power a hard di
21. s problem and you can mix the EXAMine and DEPosit switches without any unexpected consequences The rotary switch on the FP6120 has two fewer positions than a PDP 8 E the missing options are BUS and STATE Also the FLAGS position of the FP6120 omits a few bits that are displayed on the PDP 8 E in particular the USER MODE INTERRUPT INHIBIT and GREATER THAN FLAG bits are absent In a real PDP 8 E the BOOT switch was actually labeled sw the SWITCH switch and was intended as a generic OMNIBUS control signal To the best of my knowledge it was never used for any purpose other than to trigger the MI8E bootstrap loader which is consistent with the BOOT label on the FP6120 Also in the FP6120 it is necessary to press the BOOT switch twice before it has any effect this is to prevent an accidental activation of this switch 5 The PDP 8 A not the E Programmer s Console has a button labeled which has exactly the same effect as the sw switch on the 8 E In the case of the PDP 8 A however the BOOT button also must be pressed twice before it has any effect 10 24 2003 8 39 PM Page 14 Spare Time Gizmos FP6120 User s Manual The PDP 8 E front panel also had a SINGle STEP switch which would execute a single memory cycle The SBC6120 has no equivalent function however note that the PDP 8 E SINGle STEP switch did not execute a single instruction In the PDP 8 E a single instruction was executed by leaving the HAL
22. ser to the resistor and is a standard two pin header installed on the top of the front panel PC board J5 is the pair of holes closest to the switch register J4 serves a similar purpose connecting to the CPREQ header on the IOB6120 board In this case you should have installed a female header on the back side of your IOB and the male header on the back side of the front panel This arrangement allows you to plug the IOB6120 into the SBC6120 directly without a front panel if you ever want to You ll have the same problems with the length for this pair of headers that you did for the SBC6120 and you can use the same techniques to solve it At this point you should have all electronic components mounted EXCEPT the toggle switches rotary switch and LEDs 2 5 5 LED Bar and LEDs Mount the plastic LED spacer bar using seven 4 40 x flathead screws into the corresponding swage standoffs The front of the LED bar is countersunk to fit the screw heads and the back side of the LED bar is recessed to fit the swage standoffs The LED bar should fit snugly against the PC board and the screw heads should not protrude above the top of the LED bar The LED Bar supplied by Spare Time Gizmos has five extra holes which are used to secure the piece during the machining process These holes are easily identified because they are not countersunk or recessed and they should be left empty Mount a group of five or six LEDs by pushing them thru the lig
23. sionally screen printed in five colors and then laser cut for the switch openings The entire FP6120 and SBC6120 assembly including a hard disk drive is less than 2 thick and can be framed like a painting and hung on the wall Just imagine it a complete PDP 8 E clone including disk drive hanging on the wall above your desk REGULATORY WARNING In the United States the Federal Communications Commission requires that devices that use and radiate radio frequency energy be certified in accordance with CFR Title 47 Parts 2 and 15 Other countries will have different requirements 10 24 2003 8 39 PM Page 1 1 2 Spare Time Gizmos FP6120 User s Manual The FP6120 design is not in finished product form and has NOT been approved by the FCC or any other regulatory agency worldwide The user understands that approvals may be required prior to the operation of the FP6120 and agrees to utilize the FP6120 in keeping with all laws governing its operation in the country of use WARRANTY SPARE TIME GIZMOS OFFERS NO WARRANTY EXPRESS OR IMPLIED AS TO THE RELIABILITY OR ACCURACY OF THE FP6120 DESIGN SPARE TIME GIZMOS OFFERS NO WARRANTY EXPRESS OR IMPLIED AS TO THE ACCURACY OF THE INFORMATION PRESENTED IN THIS DOCUMENT SPARE TIME GIZMOS OFFERS NO WARRANTY EXPRESS OR IMPLIED AS TO THE SUITABILITY OR CORRECTNESS OF ANY SOFTWARE OR FIRMWARE SUPPLIED IN CONJUNCTION WITH THE FP6120 SPARE TIME GIZMOS MAKES NO REPRESENTATIONS AS TO TH
24. sk drive 2 4 5 Other Parts C2 and C7 are 0 01 uF monolithic capacitors and are shown on the schematic and PC board however they are not needed and may be omitted from the FP6120 It does no harm to install them though and if you already have then there s no need to remove them ASSEMBLY INSTRUCTIONS In the following instructions the front of the PC board refers to the component side the one with the silk screen and the back of the PC board is the solder side opposite the silk screen The top of the PC board is the edge that contains the Spare Time Gizmos logo and the bottom of the PC board is the edge with all the switches 2 5 1 Swage Stand offs Solder swage Ye by 4 40 standoffs are used to mount the LED bar the SBC6120 and an I O daughter board if any Some of these standoffs are mounted on the front component side of the PC board and some are mounted on the back solder side and it s very important to identify the correct holes for each standoff you purchased the kit version either part be supplied The PT78HT205H is supplied with the full kit 10 24 2003 8 39 PM Page 5 Spare Time Gizmos FP6120 User s Manual o o 519 6066000000 00060000000 SW o loo lo Io gt ollo o o l bol o 9 95 P PB PRI PIED HERA Figure 4 Mounting Holes Component Side Figure 4 shows the component side of a partially asse
25. sure that it is snug against the PC board before soldering the other terminals INSTALLING THE SBC6120 AND OTHER DAUGHTER BOARDS The SBC6120 and any I O daughter board such as the IOB6120 mount to the back solder side of the FP6120 using 4 40 7 nylon spacers inserted in the swage standoffs soldered to the PC board The Y length of the spacer plus the length of the swage gives exactly the correct 0 625 height for these boards that will allow the bus connectors to mate properly 4 40 nylon screws are used to complete the job When installing either the SBC6120 or the IOB6120 be certain that the CPREQ headers mate correctly the pins should line up with the corresponding female header and the pins must not be too long or too short See section 2 5 4 for a complete description 10 24 2003 8 39 PM Page 9 Spare Time Gizmos FP6120 User s Manual Note that the SBC6120 is installed in the center of the FP6120 face down that is with the component of the SBC6120 facing the solder side of the FP6120 The l O expansion board if any installs on the right side of the back of the FP6120 back to back that is with the solder side of the expansion board facing the solder side of the FP6120 Figure 6 illustrates the correct installation of the SBC6120 and an IOB6120 daughter card Figure 6 Assembled FP6120 SBC6120 and IOB6120 10 24 2003 8 39 PM Page 10 3 1 3 2 Spare Time Gizmos FP6120 User s M
26. there s no point in socketing them 2 5 3 Power Switch Panel Lock and Power Connector The power switch 51 panel lock switch PLOCK and DC power connector J3 all be mounted directly to the PF6120 PC board However if you plan to install the FP6120 in an enclosure of some kind it may be more convenient to mount these switches off the PC board or even remove them all together The panel lock switch PLOCK may be omitted without problems it will default to unlocked if it is not installed or you may connect it to an external switch perhaps a key switch or some kind using wire jumpers If you mount the power switch S1 elsewhere it s probably easier to simply wire it in series with the power supply rather than connecting it to the pads for S1 on the PC board If you do this be sure to solder a wire jumper between the pads for S1 on the FP6120 PC board to provide continuity for the power circuit If you mount the DC power jack J1 off the PC board be careful of the polarity the center pin is positive and the sleeve is negative 3 Sockets for these resistor packs are not included in the FP6120 full kit 10 24 2003 8 39 PM Page 7 Spare Time Gizmos FP6120 User s Manual 2 5 4 Bus Connectors J2 is a female non stacking bus connector which you should mount on the solder side of the PC board You will be soldering its pins on the component side J1 is a stacking bus connector which you should
27. two tiny toggle switches along the lower edge of the front panel Power is on the right and Panel Lock is on the left Frequently these switches will be mounted off the PC board see section 2 5 3 The Power switch of course switches power on and off for the entire SBC6120 FP6120 assembly The Panel Lock switch will disable all front panel switches except for the switch register SRO SR11 and the rotary switch Panel Lock has no effect on the data displayed by the LEDs DIFFERENCES BETWEEN THE FP6120 AND THE PDP 8 E The operation of the EXAMine switch on the FP6120 is subtly different from a real PDP 8 E A real PDP 8 E post increments the address register This means that on a real PDP 8 E the DATA LEDs display the contents of location n however at the same time the MEMORY ADDRESS LEDs show n 1 In the FP6120 the MEMORY ADDRESS and DATA displays are always synchronized i e the data displayed is always the contents of the address displayed In a real PDP 8 E it s not possible to use the EXAMine switch to step thru a sequence of locations find one that you want to change load the new data into the switch register and press DEPosit That s because a real PDP 8 E post increments after the EXAMine switch is pressed and the MEMORY ADDRESS displayed is actually one more than the corresponding data displayed If you press DEPosit at this point you ll actually change the location after the one you wanted to change The FP6120 doesn t have thi
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