User manual

AIMB-767 User Manual 72
B.23 JCASE1(Open Case Connector)
B.24 DMA Channel Assignments
B.25 Interrupt Assignments
B.26 1st MB Memory Map
Table B.24: Case Open Connector(JCASE1)
Pin Signal
1 CASE_OPEN#
2GND
Table B.25: DMA Channel Assignments
Channel Function
2 Floppy disk (8-bit transfer)
3 ECP Printer Port (LPT1)
4 Cascade for DMA controller 1
Table B.26: Interrupt Assignments
Priority Interrupt# Interrupt source
1 NMI Parity error detected
2 IRQ0 System timer
3 IRQ1 Keyboard
4 IRQ8 System CMOS/real time clock
5 IRQ9 Microsoft ACPI-Compliant System
6 IRQ10 Serial communication port 4
9 IRQ13 Numeric data processor
10 IRQ14 Primary IDE Channel
11 IRQ15 Secondary IDE Channel
12 IRQ3 Serial communication port 2
13 IRQ4 Serial communication port 1
14 IRQ5 Serial communication port 3
15 IRQ6 Standard floppy disk controller
Table B.27: 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