Dma, Irq And 1 Mb Memory; Appendix C; I/O Address Map - IEI Technology Rocky-3702EV User Manual

Appendix C.

DMA, IRQ and 1

I/O Address Map

DMA Channel Assignments:
DMA Channel #
0
1
2
3
4
5
6
7
IRQ Mapping Chart
IRQ0 System Timer
IRQ1 Keyboard
IRQ2 Cascade to IRQ Controller
IRQ3 (COM2)
IRQ4 (COM1)
IRQ5 Available
IRQ6 FDC
IRQ7 LPT1
Note: All IRQs have been assigned to the listed devices, so if
you want to add any additional device interface, you
must free the unused IRQ first. For example, if you don't
use USB K/B or Mouse, then IRQ11 may be set free.
st
MB Memory
Description
Available
Available
Floppy Disk (8-bit transfer)
Available
Cascade for DMA controller 1
Available
Available
Available
IRQ8
IRQ9
IRQ10
IRQ11
IRQ12
IRQ13
IRQ14
IRQ15
45
RTC Clock
LAN
USB
RAGE MOBILITY AGP
PS/2 Mouse
Numeric data processor
Primary IDE
Secondary IDE