System Board Components (Bios Version: Gx.07.Xx); Dma Channel Controllers (Bios Version: Gx.07.Xx) - HP 525 5/XX Technical Reference Manual

4 Summary of the HP/Phoenix BIOS
HP/Phoenix BIOS (BIOS version: GX.07.xx)
I/O Address Ports
0378-037F
03B0-03BB
03BC--03BF
03C0-03DF
03E8-03EF
03F0-03F5
03F6
03F7
03F8-03FF
0496-0497
0CF8-0CFF
1.
These addresses are dedicated to configuration registers for PCI devices.

System Board Components (BIOS version: GX.07.xx)

This section provides more details of how the BIOS uses the system board
components mentioned in the I/O port list.

DMA Channel Controllers (BIOS version: GX.07.xx)

Only "I/O-to-memory" and "memory-to-I/O" transfers are allowed.
"I/O-to-I/O" and "memory-to-memory" transfers are disallowed by the
hardware configuration.
The system controller supports seven DMA channels, each with a page
register used to extend the addressing range of the channel to 16 MB.
92
Function
Parallel port 2
Integrated video graphics controller
Parallel port 1
Integrated video graphics controller
Serial port 3
Floppy disk controller
IDE controller primary channel
Floppy disk controller
Serial port 1
Internal ports (or HP reserved)
1
Used for PCI configuration
Bits