src/mess/drivers/pc.c
| r3369 | r3370 | |
|---|
| 2311 | 2311 | |
| 2312 | 2312 | /* PC/3270 and AT/3270 have a set of two (optionally 3) 3270PGC programmable graphics controller cards on them which |
| 2313 | 2313 | have 2 extra roms, plus a number of custom chips and at least one MCU. |
| 2314 | | ** The Controller card (with one 48-pin custom, 3 40 pin customs at least one of which is an MCU, |
| 2315 | | four 2016BP-10 srams, an 8254 and an 8255 on it, two crystals (16.257MHz and 21.676MHz) plus two |
| 2316 | | mask roms ) is stickered "61X6579 // 983623 // 6390 SU" on the front. |
| 2314 | Information on these three boards plus the keyboard interface can be found at: |
| 2315 | http://www.seasip.info/VintagePC/5271.html |
| 2316 | *** The descriptions below are based on the cards from the AT/3270, which are slightly |
| 2317 | different from the PC/3270 cards. Changes between the PC/3270 and AT/3270 video cards are |
| 2318 | listed: |
| 2319 | 1. The card lip edge is changed on the APA and PS cards to allow them to be placed |
| 2320 | in a 16-bit ISA slot. |
| 2321 | 2. The Main Display board is exactly the same PCB (hence cannot be placed in a 16-bit |
| 2322 | ISA slot), but the socket to the left of the 8255 is now populated, and has a lot of |
| 2323 | rework wires connected to various places on the PCB. |
| 2324 | 3. The APA board was completely redone, and no longer has an 8254 (though it does have an |
| 2325 | empty socket) and has ?twice as much memory on it? (not sure about this). The APA |
| 2326 | board also now connects to both main board connectors 1 and 3, instead of only |
| 2327 | connector 1. |
| 2328 | 4. The PS board has been minorly redone to allow clearance for a 16-bit ISA connector, |
| 2329 | but no other significant chip changes were made. The connector 3 still exists on the |
| 2330 | board but is unpopulated. Connector 2 still connects to the Main display board as |
| 2331 | before. |
| 2332 | |
| 2333 | ** The Main Display Board (with one 48-pin custom, 3 40 pin customs at least one of which is |
| 2334 | an MCU, four 2016BP-10 srams, an 8254 and an 8255 on it, two crystals (16.257MHz and |
| 2335 | 21.676MHz) plus two mask roms ) is stickered "61X6579 // 983623 // 6390 SU" on the front. |
| 2317 | 2336 | * The pcb is trace-marked "6320987" on both the front and back. |
| 2318 | 2337 | * The card has a DE-9 connector on it for a monitor. |
| 2319 | 2338 | * The customs are marked: |
| r3369 | r3370 | |
|---|
| 2321 | 2340 | "1503193 // TC15G008AP-0020 // JAPAN 8610A" (48 pins, at U29) |
| 2322 | 2341 | "(M)1503194 // XE KGA005 // 8616N XM // SC81156P" (40 pins, at U36, likely an MCU) |
| 2323 | 2342 | "S8613 // SCN2672B // C4N40 A // CP3303" (40 pins, at U24, also possibly an MCU) |
| 2324 | | ** The All Points Addressable (Frame buffer?) card. Description is pending, but its older and |
| 2325 | | less ASIC-ified (more discrete chips) than the later version of the card included with the |
| 2326 | | AT/3270. It also is shaped in such a way that it cannot be inserted into a 16-bit ISA slot. |
| 2327 | | Description of the later AT/3270 APA card is below (functionality is PROBABLY the same between the two): |
| 2328 | | ** The All Points Addressable (Frame buffer?) card, (with 2 48-pin customs on it which are |
| 2329 | | probably gate arrays and not MCUs, an empty ?rom? socket, an Intel Id2147H-3, a bank of 12 |
| 2330 | | 16k*4-bit inmos ims2620p-15 DRAMs (tms4416 equivalent)), is stickered |
| 2343 | |
| 2344 | ** The All Points Addressable (Frame buffer?) card (with 2 48-pin customs on it which are |
| 2345 | probably gate arrays and not MCUs, an empty socket (28 pins, U46), an Intel Id2147H-3, |
| 2346 | a bank of twelve 16k*4-bit inmos ims2620p-15 DRAMs (tms4416 equivalent), and an Intel |
| 2347 | D2147K 4096*1 byte SRAM) is stickered |
| 2331 | 2348 | "6487836 // A24969 // 6400 SU" on the back. |
| 2332 | 2349 | * The pcb is trace-marked "EC 999040" on the back, and silkscreened "RC 2682819" on the front |
| 2350 | * The customs are marked: |
| 2351 | "6323259 // TC15G008AP-0028 // JAPAN 8606A" (48 pins, at U67) |
| 2352 | "6323260 // TC15G022AP-0018 // JAPAN 8606A" (48 pins, at U45) |
| 2353 | |
| 2333 | 2354 | ** The optional Programmable Symbol Card (with an AMD AM9128-10PC, and six tms4416-15NL DRAMS, |
| 2334 | 2355 | and a fleet of discrete logic chips, but no roms, pals, or proms) is stickered |
| 2335 | 2356 | "6347750 // A24866 // 6285 SU" on the front. |