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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
0000-000F DMA Controller 1 8
0020-0021 Interrupt Controller 1 8
0040-0043 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
0081-0083, 008F DMA Low Page register 8
0092 Alternate reset and A20 Function 8
0096-009F Internal Ports 8
00A0-00A1 Interrupt Controller 2 8
00C0-00DF DMA Controller 2 8
00F0-00FF Co-processor error
0170-0177, 0376 Secondary IDE Controller
01F0-01F7 Primary IDE Controller
0278-027F Parallel Port 3
02E8-02EF Serial Port 4
02F8-02FF Serial Port 2
0370-0377 Secondary Floppy Disk Controller
0378-037F Parallel Port 2
03B0-03DF Integrated Video Graphics Controller
03C0-03DF Integrated Video Graphics Controller