IBM PCjr: Revision history

25 September 2026

• curprev 00:2000:20, 25 September 2026 Josh talk contribs 13,617 bytes −76 P4 verification: remove the now-duplicated manual link bullet (superseded by the fuller documentation line) undo
• curprev 00:1900:19, 25 September 2026 Josh talk contribs 13,693 bytes +122 P4 verification: link the IBM manuals hosted on this wiki that document this machine (they were unlinked from every article) undo

23 September 2026

• curprev 03:2803:28, 23 September 2026 Josh talk contribs 13,571 bytes +3,465 Rebuilt against IBM's own PCjr Technical Reference (hosted here). Power section was wrong: the external brick is a 17 Vac transformer only - no rectifier, regulator or bulk capacitor - and all rectification, regulation and protection are on the internal Power Board; added IBM's +5/+12/-6 V rails, load currents, tolerances, trip points and the 1.5 A minimum +5 V load needed for -6 V. Video corrected: the subsystem is a 6845 plus IBM's Video Gate Array LSI5220 with a 16-entry palette, and the d... undo

23 May 2026

• curprev 17:3217:32, 23 May 2026 Josh talk contribs 10,106 bytes 0 Reduce infobox badge size from 250px to 150px undo
• curprev 17:3017:30, 23 May 2026 Josh talk contribs 10,106 bytes +55 Add IBM badge to infobox (logo = File:IBM PCjr wordmark.svg) undo

21 May 2026

• curprev 11:1911:19, 21 May 2026 Josh talk contribs 10,051 bytes −1 →Models undo
• curprev 11:1811:18, 21 May 2026 Josh talk contribs 10,052 bytes +10,052 Create/rewrite IBM PC AT (5170) and IBM PCjr (4860) page set with verified facts, real images, and embedded content per RTC style guide