User manual

AIMB-781 User Manual 88
B.25 Interrupt Assignments
B.26 1st MB Memory Map
Table B.25: Interrupt assignments
Priority Interrupt# Interrupt source
1 NMI Parity error detected
2 IRQ0 Interval timer
3 IRQ1 Keyboard
- IRQ2 Interrupt from controller 2 (cascade)
4 IRQ8 Real-time clock
5 IRQ9 Cascaded to INT 0A (IRQ 2)
6 IRQ10 Available/Serial communication port 4
7 IRQ11 Available
8 IRQ12 PS/2 mouse
9 IRQ13 INT from co-processor
10 IRQ14 Available
11 IRQ15 Available
12 IRQ3 Serial communication port 2
13 IRQ4 Serial communication port 1
14 IRQ5 Serial communication port 3
15 IRQ6 Available
16 IRQ7 Parallel port 1 (print port)
Table B.26: 1st MB memory map
Addr. range (Hex) Device
E0000h - FFFFFh BIOS
CC000h - DFFFFh Unused
C0000h - CBFFFh VGA BIOS
A0000h - BFFFFh Video Memory
00000h - 9FFFFh Base memory