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IBM 5120: Revision history

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24 September 2026

  • curprev 21:4721:47, 24 September 2026 Josh talk contribs 12,869 bytes +36 De-link four red links (bitsavers.org, IBM 1130, IBM 5114 Diskette Unit, IBM Datamaster) to existing pages or plain text undo
  • curprev 21:4721:47, 24 September 2026 Josh talk contribs 12,833 bytes +2,277 Fix refs so they render; PSU is two boards - TSR board A2 plus a ferroresonant board A1 for the diskettes with fuses F2/F3/F4 - not a beefed-up linear supply; add the 60-second restart rule (not five seconds as on the 5100/5110); remove unsourced Model F keyboard claim undo

23 May 2026

  • curprev 16:4116:41, 23 May 2026 Josh talk contribs 10,556 bytes +10,556 Deep technical pre-PC IBM page with verified sources (Bitsavers MIM/MAP, Wikipedia, IBM Archives) — honest gap disclosure where IBM did not publish per-board cap values
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