Table of Contents
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DMA Channel Assignment
DMA Channel
DRQ0
DRQ1
DRQ2
DRQ3
DRQ4
DRQ5
DRQ6
DRQ7
I/O Address Map
I/O Address
000-00F
020-021
040-043
060, 064
061
040B
061
070-071
080-08F
0A0-0A1
0C0-0DF
0F0-0FF
120-13F
180-18F
170-177
1F0-1F7
220-22F
240-24F
278-27F
2E8-2EF
2F8-2FF
378, 37A
Chapter 1
Audio or FIR(optional)
ECP or Audio or FIR(optional)
Floppy
ECP or FIR(optional)
Not Used
Not used
Not used
Not used
DMA controller-1
Interrupt controller-1
Timer 1
Keyboard controller 8742 chip select
System speaker out
DMA controller-1
System speaker
Real-time clock and NMI mask
DMA page register
Interrupt controller-2
DMA controller-2
Numeric data processor
Power management controller
2nd EIDE device (CD-ROM) select
1st EIDE device (hard drive) select
Audio
Audio(optional)
Parallel port 3
COM4
COM2 or FIR(optional)
Parallel port 2
Function
Function
25
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