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IBM PS/2 Model 80: Revision history

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25 September 2026

22 September 2026

  • curprev 00:0300:03, 22 September 2026 Josh talk contribs 26,359 bytes +14,479 Verified against IBM Technical Reference (Oct 1990), IBM announcement letters 187-051/187-052/187-150/190-055, IBM tech-spec sheet GJAN-43WKBR and ardent-tool planar maps. Fixed: slots are 3x32-bit + 5x16-bit (or 4+4 on the 25 MHz board), not 1x8-bit + 7x32-bit; three planar types, not two, and Type 1 is 16 MHz only; RTC is a Motorola MC146818A with a separate 6 V lithium pack (FRU 72X8498), not a Dallas module; planar memory is two IBM memory-card connectors (4 MB, or 8 MB on the Axx), not 4... undo

21 September 2026

23 May 2026

22 May 2026