Dma Channel Controllers - HP Kayak xu700 Technical Reference Manual

Default Values for
I/O Address Ports
03F8 - 03FF
04D0 - 04D1
0778 - 077F
0CF8 - 0CFF
C000 -
C100 - C10F

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.
Interrupt Controllers
The system has an Interrupt controller which is equivalent in function to
that of two 82C59 interrupt controllers. The following table shows how the
interrupts are connected to the APIC controller. The Interrupt Requests
(IRQ) are numbered sequentially, starting with the master controller, and
followed by the slave (both of 82C59 type).
COM1
Interrupt edge/level control
LPT1 ECP
PCI configuration space
Power Management I/O space and ACPI Registers
SMBus I/O space
DMA controller
Channel Function
DMA 0 Free
DMA 1 Free if not used for parallel port in Setup
DMA 2 Floppy disk drive controller
DMA 3 Free if not used for parallel port in Setup
DMA 4 Used to cascade DMA channels 0-3
DMA 5 Free
DMA 6 Free
DMA 7 Free
5 HP BIOS
BIOS Addresses
Function
93