4 Summary of the HP/Phoenix BIOS
HP/Phoenix BIOS (BIOS version: GJ.07.xx)
BIOS I/O Port Map (BIOS version: GJ.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 |
| |
|
|
|
|
|
Interrupt Controller 1 | 8 |
| ||
|
|
|
|
|
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 |
| |
|
|
|
|
|
| Internal Ports | 8 |
| |
|
|
|
|
|
| Interrupt Controller 2 | 8 |
| |
|
|
|
|
|
| DMA Controller 2 | 8 |
| |
|
|
|
|
|
|
|
| ||
|
|
|
|
|
Secondary IDE Controller |
|
| ||
|
|
|
|
|
| Primary IDE Controller |
|
| |
|
|
|
|
|
| Parallel Port 3 |
|
| |
|
|
|
|
|
| Serial Port 4 |
|
| |
|
|
|
|
|
| Serial Port 2 |
|
| |
|
|
|
|
|
Secondary Floppy Disk Controller |
|
| ||
|
|
|
|
|
| Parallel Port 2 |
|
| |
|
|
|
|
|
| Integrated Video Graphics Controller |
|
| |
|
|
|
|
|
| Integrated Video Graphics Controller |
|
| |
|
|
|
|
|
|
|
|
|
|
105