Revision as of 08:45, 29 January 2025 view source Retroand (talk \| contribs) Bureaucrats, Interface administrators, Administrators 666 edits →‎I/O Ports ← Older edit		Revision as of 11:25, 2 February 2025 view source Retroand (talk \| contribs) Bureaucrats, Interface administrators, Administrators 666 edits →‎I/O Ports Newer edit →
Line 195: \| 48h-4Bh \|\| 8251 \|\| USART \|- \| 4Ch \|\| 8255#3 \|\| Data bus test register / Character ROM pagination \|- \| 4Dh-4Eh \|\| 8255#3 \|\| C option switches

IBM System/23 Datamaster: Difference between revisions