src/mess/drivers/pc.c
| r3368 | r3369 | |
|---|
| 2257 | 2257 | * Unlike the much more complex keyboard controller used in the AT/3270, this one only has one rom, |
| 2258 | 2258 | a motorola made "(M)1503828 // XE // 8434A XM // SC81155P" custom (an MCU?; the more complicated |
| 2259 | 2259 | 3270/AT keyboard card uses this same exact chip), an 8254, and some logic chips. |
| 2260 | | (I can't tell based on the lousy picture (http://www.seasip.info/VintagePC/Images/5271kbc.jpg) |
| 2261 | | whether it has pals or proms on it, nor can the location numbers of anything be clearly seen.) |
| 2260 | Thanks to high resolution pictures provided by John Elliott, I can see that the location of the |
| 2261 | chips is unlabeled (except for by absolute pin position on the back), and there are no pals or proms. |
| 2262 | 2262 | * The board is stickered "2683114 // 874999 // 8446 SU" on the front. |
| 2263 | 2263 | * The board has a single DE-9 connector where the keyboard dongle connects to. |
| 2264 | 2264 | * The keyboard dongle has two connectors on it: a DIN-5 connector which connects to the Motherboard's |
| r3368 | r3369 | |
|---|
| 2321 | 2321 | "1503193 // TC15G008AP-0020 // JAPAN 8610A" (48 pins, at U29) |
| 2322 | 2322 | "(M)1503194 // XE KGA005 // 8616N XM // SC81156P" (40 pins, at U36, likely an MCU) |
| 2323 | 2323 | "S8613 // SCN2672B // C4N40 A // CP3303" (40 pins, at U24, also possibly an MCU) |
| 2324 | | ** The Frame-Buffer? Card (with 2 48-pin customs on it which are probably gate arrays and not MCUs, |
| 2325 | | an empty ?rom? socket, an Intel Id2147H-3, a bank of 12 16k*4-bit inmos ims2620p-15 DRAMs |
| 2326 | | (tms4416 equivalent)), is stickered "6487836 // A24969 // 6400 SU" on the back. |
| 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 |
| 2331 | "6487836 // A24969 // 6400 SU" on the back. |
| 2327 | 2332 | * The pcb is trace-marked "EC 999040" on the back, and silkscreened "RC 2682819" on the front |
| 2328 | 2333 | ** The optional Programmable Symbol Card (with an AMD AM9128-10PC, and six tms4416-15NL DRAMS, |
| 2329 | 2334 | and a fleet of discrete logic chips, but no roms, pals, or proms) is stickered |