I/O Traps Register: Difference between revisions
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updated to 78a6ee50 |
m Xalior moved page I/O Traps to I/O Traps Register: match formal nextreg.txt name |
(No difference)
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Latest revision as of 12:45, 14 October 2025
| Number | TBRegisterNumber::$D8 |
|---|---|
| Readable | TBRegisterReadable::Yes |
| Writable | TBRegisterWritable::Yes |
| Short Description | ShortDesc::experimental |
bits 7:1 = Reserved must be zero bit 0 = 1 to enable +3 FDC traps on ports 0x2ffd and 0x3ffd
- An i/o trap generates a multiface nmi and is indicated in nextreg 0x02
- Traps cannot be triggered by the dma or while the multiface, divmmc or external nmi is active