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24 September 2026
| 21:53 | IBM PALM processor diffhist +16,854 Josh talk contribs (Fix refs so they render; record IBMs own 1977 description (two-chip 8-bit processor, 49 microinstructions - the 49 count is confirmed exactly by Appendix C); correct the cycle-timing section (E phase is 1-5 E cycles, not 1-3; 530 ns is not a machine cycle); split the 5100 and 5110 I/O device-address tables - nine 5100 addresses are unassigned and the 5110 has no address 2 or F; correct the interrupt-level device assignments; quote IBMs own definition of the jump microinstructions and the hard...) | ||||
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21:47 | IBM 5120 2 changes history +2,313 [Josh (2×)] | |||
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21:47 (cur | prev) +36 Josh talk contribs (De-link four red links (bitsavers.org, IBM 1130, IBM 5114 Diskette Unit, IBM Datamaster) to existing pages or plain text) | ||||
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21:47 (cur | prev) +2,277 Josh talk contribs (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) | ||||
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21:47 | IBM 5110 2 changes history +4,971 [Josh (2×)] | |||
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21:47 (cur | prev) +51 Josh talk contribs (De-link four red links (bitsavers.org, IBM 1130, IBM 5114 Diskette Unit, IBM Datamaster) to existing pages or plain text) | ||||
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21:47 (cur | prev) +4,920 Josh talk contribs (Fix refs so they render; PSU is a transistor switching regulator (five rails incl +8.5 V), not linear; processor is slot J2 not G2; IEEE bus verified from IBM logic sheet 445 (24-pin Y3, card K2); EBCDIC claim removed - the word appears nowhere in the 5110 MIM; add bring-up diagnostic card mapping) | ||||
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21:47 | IBM 5100 2 changes history +6,662 [Josh (2×)] | |||
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21:47 (cur | prev) −8 Josh talk contribs (De-link four red links (bitsavers.org, IBM 1130, IBM 5114 Diskette Unit, IBM Datamaster) to existing pages or plain text) | ||||
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21:47 (cur | prev) +6,670 Josh talk contribs (Fix refs so they render; correct dimensions (445x610x203 mm, IBM's figures - width and depth were transposed) and weight (50 lb/24 kg) to MIM Appendix B; PSU is a transistor switching regulator with five rails incl +8.5 V, not a linear supply with series-pass regulators; state that IBM never uses the name PALM; cite IBM's own 1977 design paper, newly hosted) | ||||
22 September 2026
| N 01:28 | IBM 5100 Maintenance Information Manual diffhist +2,200 Josh talk contribs (Create documentation page for newly hosted IBM field service manual (RTC verification drive)) | ||||