Revision as of 11:25, 2 February 2025 view source Retroand (talk \| contribs) Bureaucrats, Interface administrators, Administrators 666 edits →‎I/O Ports ← Older edit		Revision as of 07:43, 6 April 2025 view source Retroand (talk \| contribs) Bureaucrats, Interface administrators, Administrators 666 edits →‎Diagnostics Newer edit →
Line 242: ! Test !! Description !! Notes \|- \| 00/FF (uninitialized) \|\| Data bus test (undocumented) \|\| writes and reads to port 0x4C (8255 ~~managing keyboard~~#3, port A). \|- \| 01 \|\| CPU \|\| 8085 self-test.

IBM System/23 Datamaster: Difference between revisions