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