HP Kayak XU Technical Reference Manual page 64

4 HP BIOS
BIOS Addresses
I/O Address Ports
0378h - 037Ah
0388h - 038Bh
03B0h - 03DFh
03E8h - 03EFh
03F0h - 03F5h
03F6h
03F7h
03F8h - 03FFh
0678h - 067Bh
0778h - 077Bh
0CF8h - 0CFFh
8000
8400
8800
DMA Channel Controllers
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. The following table summarizes how the DMA
channels are allocated.
Channel
0 AD1816 Capture
1 AD1816 Playback
2 NS317 Flexible disk controller
3 NS317 LPT ECP
4 Cascade from first DMA controller
5 Free
6 Free
7 Free
56
Function
Parallel port 1 (LPT1)
AD1816 Ad-lib (FM)
Video controller
Serial port 3 (COM3)
Primary flexible disk drive controller
IDE primary channel
Primary flexible disk drive controller
Serial port 1 (COM1)
Parallel port if ECP mode is selected 2 (LPT2 ECP)
Parallel port if ECP mode is selected 1 (LPT1 ECP)
Configuration registers for PCI devices
PIIX4 Power Management I/O space
NS317 ACPI Registers
PIIX4 SMBus I/O space
DMA controller
Function