IBM System/23 Datamaster: Difference between revisions
| Line 183: | Line 183: | ||
| 2Fh || 8255#1 || 8255#1 control port | | 2Fh || 8255#1 || 8255#1 control port | ||
|- | |- | ||
| 40h || 8255#2 || | | 40h || 8255#2 || Keyboard scan codes | ||
|- | |- | ||
| 41h || 8255#2 || Service port | | 41h || 8255#2 || Service port | ||
|- | |- | ||
| 42h || 8255#2 || | | 42h || 8255#2 || Keyboard control signals | ||
|- | |- | ||
| 43h || 8255#2 || 8255#2 control port | | 43h || 8255#2 || 8255#2 control port | ||
| Line 197: | Line 197: | ||
| 4Ch || 8255#3 || Data bus test register | | 4Ch || 8255#3 || Data bus test register | ||
|- | |- | ||
| 4Dh-4Eh || 8255#3 || | | 4Dh-4Eh || 8255#3 || C option switches | ||
|- | |- | ||
| 4Fh || 8255#3 || 8255#3 control port | | 4Fh || 8255#3 || 8255#3 control port | ||