Related changes
Enter a page name to see changes on pages linked to or from that page. (To see members of a category, enter Category:Name of category). Changes to pages on your Watchlist are in bold.
List of abbreviations:
- N
- This edit created a new page (also see list of new pages)
- m
- This is a minor edit
- b
- This edit was performed by a bot
- (±123)
- The page size changed by this number of bytes
27 September 2026
| 10:31 | IBM PS/2 Model 50 Troubleshooting Guide diffhist +16,143 Josh talk contribs (Rebuild the POST tables from Ardent Tool's reproduction of IBM's own symptom/FRU lists: the previous tables mixed PC/AT-era meanings into PS/2 codes and contained codes not in IBM's list; '161 replace Dallas DS12887' was wrong (the Model 50 takes a 6 V pack, FRU 72X8498 - no Dallas module is fitted); correct the beep codes to IBM's five patterns; delete the ECA section (ECA 092 is verifiably the 8570 Data Modification Patch, ECA 087 cannot be corroborated), the unsourced PSU wattage and the S...) | ||||
25 September 2026
|
|
00:20 | IBM PS/2 Model 50 2 changes history +101 [Josh (2×)] | |||
|
|
00:20 (cur | prev) −157 Josh talk contribs (P4 verification: remove the now-duplicated manual link bullet (superseded by the fuller documentation line)) | ||||
|
|
00:19 (cur | prev) +258 Josh talk contribs (P4 verification: link the IBM manuals hosted on this wiki that document this machine (they were unlinked from every article)) | ||||
| 00:18 | File:IBM PS2 Model 50 Schematics.pdf diffhist +1,171 Josh talk contribs (P4 verification: real File: description - document identity from its own title page, page count, honest source note and honest licence block) | ||||
| 00:16 | IBM PS2 Model 80 Schematics diffhist +3,769 Josh talk contribs (P4 verification: real documentation page - title as printed, part/form number, edition, contents, honest gaps, what it settles, cross-links) | ||||
| 00:16 | IBM PS2 Model 50 Technical Reference (May 1988) diffhist +3,282 Josh talk contribs (P4 verification: real documentation page - title as printed, part/form number, edition, contents, honest gaps, what it settles, cross-links) | ||||
| 00:16 | IBM PS2 Model 50 Hardware Maintenance Reference diffhist +3,753 Josh talk contribs (P4 verification: real documentation page - title as printed, part/form number, edition, contents, honest gaps, what it settles, cross-links) | ||||
| 00:16 | IBM PS2 Model 30 Schematics diffhist +3,826 Josh talk contribs (P4 verification: real documentation page - title as printed, part/form number, edition, contents, honest gaps, what it settles, cross-links) | ||||
23 September 2026
| 03:34 | IBM PS/2 Model 50 diffhist +5,410 Josh talk contribs (Rebuilt against IBM's Model 50 Technical Reference and Hardware Maintenance Reference (both hosted here) plus ardent-tool. Corrections: the RTC is a Motorola MC146818A soldered at ZM47 with a SEPARATE 6 V lithium battery (72X8498) in the battery/speaker assembly (FRU 33F5950), not a Dallas DS1287/DS12887 module; there is NO -5 V rail (IBM lists only +5, +12 and -12); the BIOS is four 27256s at ZM13-ZM16, not two 64 KB devices; the four channel connectors are described as IBM describes them (o...) | ||||
21 September 2026
|
|
23:38 | IBM PS/2 Model 50 Maintenance Guide 2 changes history +15,568 [Josh (2×)] | |||
|
|
23:38 (cur | prev) +15,548 Josh talk contribs (Verification pass: removed the Dallas DS1287/DS12887 RTC (the 8550 uses an MC146818A with an external 6 V battery/speaker assembly), the invented +/-0.25 V rail table and the non-existent -5 V rail, the 54x1 mm floppy belt, the 125 ns SIMM and 85 ms access figures and the MCA riser; added IBM service limits, the Model 50 under-voltage sense levels and real FRU data; full <ref> citations; {{Unverified data}} cleared) | ||||
|
|
21:51 (cur | prev) +20 Josh talk contribs (Verification drive: flag unverified component data pending check against a primary source) | ||||
|
|
23:38 | IBM PS/2 Model 50 Capacitor Replacement Guide 2 changes history +11,455 [Josh (2×)] | |||
|
|
23:38 (cur | prev) +11,435 Josh talk contribs (Verification pass: removed unsourced PSU and adapter capacitor tables, the fabricated 54x1 mm floppy belt (MF355C is direct drive), the through-hole drive-board values and the 106 16V tantalum figure extrapolated from IBM 51xx boards; corrected the SMD-electrolytic story (8550/50Z planars use SMD tantalum, the drives are what leak); corrected the drive/adapter lineup and the 104xx codes; full <ref> citations to IBM TechRef/HMR/HMM and ardent-tool; {{Unverified data}} cleared) | ||||
|
|
21:51 (cur | prev) +20 Josh talk contribs (Verification drive: flag unverified component data pending check against a primary source) | ||||