4 Summary of the HP/Phoenix BIOS
HP/Phoenix BIOS (BIOS version: GX.07.xx)
BIOS I/O Port Map (BIOS version: GX.07.xx)
This section describes the HP BIOS port map. The next section provides more details about how the BIOS uses the system board components mentioned in the I/O port list.
I/O Address Ports | Function | Bits |
|
|
|
DMA controller 1 | 8 | |
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|
|
Interrupt controller 1 | 8 | |
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|
|
Interval timer 1 | 8 | |
|
|
|
0060, 0064 | Keyboard controller | 8 |
|
|
|
0061 | NMI status and control | 8 |
|
|
|
0070 | NMI mask register, RTC address | 8 |
|
|
|
0071 | RTC data | 8 |
|
|
|
DMA low page register | 8 | |
|
|
|
0092 | Alternate reset and A20 Function | 8 |
|
|
|
Interrupt controller 2 | 8 | |
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|
|
DMA controller 2 | 8 | |
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| ||
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|
HP reserved |
| |
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|
I/O Controller |
| |
|
|
|
IDE controller secondary channel |
| |
|
|
|
IDE controller primary channel |
| |
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|
|
Parallel port 3 |
| |
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|
Serial Port 4 |
| |
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Serial Port 2 |
| |
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Secondary floppy disk controller |
| |
|
|
|
0376 | IDE controller secondary channel |
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|
|
0377 | Secondary floppy disk controller |
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|
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