Bitfields for Intel PIIX4 ISA I/O recovery timer |
| Bit | Description | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
7 |
disable aliasing PORTs 90h-9Fh into 80h-8Fh (except PORT 0092h) | ||||||||||||
|
6 |
enable 8-bit I/O recover timer in bits 5-3 | ||||||||||||
|
5 - 3 |
additional 8-bit I/O recovery time (added to 3.5 SYSCLK
minimum)
|
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|
2 |
enable 16-bit I/O recovery timer in bits 1-0 | ||||||||||||
|
1 - 0 |
additional 16-bit I/O recovery time (added to 3.5 SYSCLK
minimum)
|
|
See Also: |