Part III: Appendixes
System Resources
277
DMA channel assignments
Direct Memory Access (DMA) allows some devices to transfer
data to and from memory at high speeds, without using the CPU.
Such devices are each assigned a unique DMA channel. The
computer has two DMA controllers with four channels on each
controller, a total of eight DMA channels.
The following table lists the computer’s DMA channel
assignments.
DMA
Use
Notes
0
Sound system
Choice for sound system
1
Sound system
Choice for ECP
2
3.5-inch diskette drive
3
ECP
Choice for sound system, ECP
4
Cascade from DMA channel 1
5
Reserved
6
Reserved
7
Reserved
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Страница 111: ...Part I Getting to Know Your Computer Learning the Basics Caring for your computer 85 ...
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