Chapter 1
25
DMA Channel Assignment
DMA Channel
Function
DRQ0
Audio or FIR(optional)
DRQ1
ECP or Audio or FIR(optional)
DRQ2
Floppy
DRQ3
ECP or FIR(optional)
DRQ4
Not Used
DRQ5
Not used
DRQ6
Not used
DRQ7
Not used
I/O Address Map
I/O Address
Function
000-00F
DMA controller-1
020-021
Interrupt controller-1
040-043
Timer 1
060, 064
Keyboard controller 8742 chip select
061
System speaker out
040B DMA
controller-1
061
System speaker
070-071
Real-time clock and NMI mask
080-08F
DMA page register
0A0-0A1
Interrupt controller-2
0C0-0DF
DMA controller-2
0F0-0FF
Numeric data processor
120-13F
180-18F
Power management controller
170-177
2nd EIDE device (CD-ROM) select
1F0-1F7
1st EIDE device (hard drive) select
220-22F
Audio
240-24F
Audio(optional)
278-27F
Parallel port 3
2E8-2EF
COM4
2F8-2FF
COM2 or FIR(optional)
378, 37A
Parallel port 2
Содержание TravelMate 330 Series
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Страница 42: ...42 SystemIntroductions ...
Страница 84: ...84 Removal and Replacement ...
Страница 100: ...100 Troubleshooting ...
Страница 114: ...114 Model Number and Configurations ...
Страница 118: ...118 Test Compatible Components List ...