IBM System/23 Datamaster: Difference between revisions
Detailed 8255 PPI ports |
Separated ports 42h and 43h |
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| Line 179: | Line 179: | ||
| 41h || 8255#2 || Service port | | 41h || 8255#2 || Service port | ||
|- | |- | ||
| 42h-43h || 8255#2 || | | 42h || 8255#2 || Unknown | ||
|- | |||
| 43h || 8255#2 || 8255#2 control port | |||
|- | |- | ||
| 44h-47h || 8275 || CRTC | | 44h-47h || 8275 || CRTC | ||