IBM System/23 Datamaster: Difference between revisions
Fixed quick facts table |
Detailed 8255 PPI ports |
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| Line 167: | Line 167: | ||
| 28h-2Bh || 8259 || PIC | | 28h-2Bh || 8259 || PIC | ||
|- | |- | ||
| 2Ch-2Fh || 8255#1 || | | 2Ch || 8255#1 || Language/Region switches | ||
|- | |||
| 2Dh || 8255#1 || CE/ROM Update switches | |||
|- | |||
| 2Eh || 8255#1 || Unknown | |||
|- | |||
| 2Fh || 8255#1 || 8255#1 control port | |||
|- | |- | ||
| 40h || 8255#2 || Unknown | | 40h || 8255#2 || Unknown | ||
| Line 181: | Line 187: | ||
| 4Ch || 8255#3 || Data bus test register | | 4Ch || 8255#3 || Data bus test register | ||
|- | |- | ||
| 4Dh-4Fh || 8255#3 || | | 4Dh-4Eh || 8255#3 || Keyboard port/C option switches | ||
|- | |||
| 4Fh || 8255#3 || 8255#3 control port | |||
|} | |} | ||