IBM PS2 Model 80 Schematics
The PS/2 Model 80 schematic set is twenty sheets of third-party logic drawings of the PS/2 Model 80 (8580) system board. Every title block reads "Maintenance Information Technologies", "PS/2 80", "90X9152-01" and "COPYRIGHT APPLIED FOR", with sheet number "n OF 20", revision 1 and date 10/16/91. The notice beside the title block says the content was sold for the buyer's unlimited use and must not be copied for republication or distribution outside the buyer's company, and gives no warranty of accuracy. The scan is image-only.
The drawings are of the board marked 90X9152-01. Check the number on the board in hand before relying on a designator.
Contents
edit| Sheet | Title | Sheet | Title |
|---|---|---|---|
| 1 | Bus | 11 | Real Time Clock |
| 2 | CPU | 12 | DMA I/F |
| 3 | Video I/F | 13 | Bus Connectors A |
| 4 | Memory | 14 | Bus Connectors B |
| 5 | Clocks | 15 | I/O Control |
| 6 | Interrupts | 16 | PALs |
| 7 | Serial I/O | 17 | Bus Signals |
| 8 | Printer I/O | 18 | PALs B |
| 9 | Keyboard I/F | 19 | PALs C |
| 10 | Disk I/F | 20 | PALs C (continued) |
The drawings carry designators and values for the parts on each circuit. Sheet 11, for example, has the MC146818A real-time clock with its 32.768 kHz crystal and the LM386 audio amplifier with its capacitors. The four PAL sheets show the programmable logic devices as connection diagrams with their pin signals; they do not give the PAL equations.
What this document does not contain
editThere is no parts list, bill of materials, board layout or power-distribution sheet, so the set is not a complete capacitor list, and there are no PAL programming equations.
Pages that cite this document
edit- IBM PS/2 Model 80 and IBM PS/2 Model 80 Capacitor Replacement Guide link it.
- The Model 80 technical references of April 1987, May 1988 and October 1990, IBM PS2 Model 30 Schematics, IBM PS2 Model 50 Schematics and IBM PS2 225W Power Supply 72X6665 Schematic (Tube Time, 2024) list it as related.
Download: IBM PS2 Model 80 Schematics.pdf