Revision as of 18:04, 27 December 2024 view source Retroand (talk \| contribs) Bureaucrats, Interface administrators, Administrators 666 edits Updated I/O ports with data bus test register ← Older edit		Revision as of 12:06, 28 December 2024 view source Retroand (talk \| contribs) Bureaucrats, Interface administrators, Administrators 666 edits →‎Diagnostics Newer edit →
Line 197: ! Test !! Description !! Notes \|- \| 00/FF (uninitialized) \|\| Data bus test (undocumented) \|\| writes and reads to port 0x4C (8255 managing keyboard, port A) \|- \| 01 \|\| CPU \|\| 8085 self-test

IBM System/23 Datamaster: Difference between revisions