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DMA-Channel Assignments
The following table shows the DMA-channel assignments.
DMA
Channel
Description
0
Available for ISA bus if not used for system audio
1
Available for ISA bus if not used for system audio
2
Diskette drive controller
3
Available for ISA bus if not used for parallel port (ECP must be enabled)
4
Cascade (Not Available)
5
Available for ISA bus
6
Available for ISA bus
7
Available for ISA bus
Note:
DMA operations can be performed only between ISA or system-board devices and ISA memory, PCI
memory, or system memory.
Audio needs up to 2 channels, they can only be mapped to DMA channels 0 and 1. ECP needs only
one channel, 0, 1, or 3.
C-2
7043 43P Series User's Guide
Содержание RS/6000 7043 43P Series
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