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75 Chapter B
B.6 Interrupt Assignments
B.7 1st MB Memory Map
4000-40BF Motherboard resources
5000-501F Intel® 82801DB/DBM SMBus controller -24C3
C000-C0FF ATI Technologies Inc. Rage XL PCI
C400-C43F Intel® 82540EM based network connection #2
C800-C83F Intel® 82540EM based network connection
CC00-CC3F Intel® PRO/100 VE network connection
D000-D01F Intel® 82801DB/DBM USB universal host controller - 24C4
D400-D41F Intel® 82801DB/DBM USB universal host controller - 24C2
F000-F00F Intel® 82801DB Ultra ATA Storage controller - 24CB
Table B.6: Interrupt assignments
Interrupt# Interrupt source
IRQ 0 (ISA) System timer
IRQ 1 (ISA) Standard 101/102-Key or Microsoft natural PS/2 keyboard
IRQ 3 (ISA) Communications port (COM2)
IRQ 4 (ISA) Communications port (COM1)
IRQ 5 (ISA) A-IPM driver
IRQ 8 (ISA) System CMOS / real time clock
IRQ 9 (ISA) Microsoft ACPI-Compliant system
IRQ 12 (ISA) PS/2 compatible mouse
IRQ 13 (ISA) Numeric data processor
IRQ 14 (ISA) Primary IDE channel
IRQ 15 (ISA) Secondary IDE channel
Table B.7: 1st MB memory map
Address range (Hex) Device
F000h - FFFFh System ROM
CC00h - EFFFh Unused
CA00h - CBFFh Used
C000h - C9FFh Expansion ROM
B800h - BFFFh CGA/EGA/VGA text
B000h - B7FFh Unused
A000h - AFFFh EGA/VGA graphics
0000h - 9FFFh Base memory.