IBM PS/2 Model 80 Troubleshooting Guide: Revision history

27 September 2026

• curprev 10:3610:36, 27 September 2026 Josh talk contribs 21,215 bytes +6,485 Rebuild against Ardent Tool's three 8580 planar pages: there are three planar types not two, and the -111/-311 models were on the wrong one; 'seven 32-bit MCA slots' and 'one 8-bit MCA slot' do not exist (Types 1/2 have three 32-bit and five 16-bit, Type 3 four and four); the 70 ns memory requirement is unsourced (both documented kits are 80 ns); replace the three invented ECAs with the real ECA 051 (8580 memory parity errors, FCT841 modules at U24/U34) in IBM's own words; '161 - replace DS12... undo

16 July 2026

• curprev 13:0713:07, 16 July 2026 Josh talk contribs 14,730 bytes +103 Add representative photo (Wikimedia Commons, attributed on file page) undo
• curprev 00:1700:17, 16 July 2026 Josh talk contribs 14,627 bytes +3,423 Expand troubleshooting: RIFA/tantalum + Dallas/planar battery (161/163) + POST codes; cited undo

22 May 2026

• curprev 10:4610:46, 22 May 2026 Josh talk contribs 11,204 bytes +11,204 Split combined PS/2 50/60 and 70/80 pages into per-model pages