Bitfields for OPTi FireLink/FireBlast "HceControl" register |
| Bit | Description | ||||||
|---|---|---|---|---|---|---|---|
|
31 - 9 |
reserved | ||||||
|
8 |
A20 gate state | ||||||
|
7 |
IRQ12 active (write 1 to clear) | ||||||
|
6 |
IRQ1 active (write 1 to clear) | ||||||
|
5 |
A20 gate sequence:
|
||||||
|
4 |
external IRQ emulation enable | ||||||
|
3 |
IRQ enable | ||||||
|
2 |
character pending emulation enable | ||||||
|
1 |
(read-only) emulation interrupt condition | ||||||
|
0 |
emulation enable |
|
See Also: |