B-3. timer & dma channels map – Curtis AR-B1682 User Manual
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B-3. TIMER & DMA CHANNELS MAP
Timer Channel Map :
Timer Channel
Assignment
0
System timer interrupt
1
DRAM Refresh request
2
Speaker tone generator
DMA Channel Map :
DMA Channel
Assignment
0
Available
1
IBM SDLC
2
Floppy Disk adapter
3
Channel-3 Available
4
Cascade for DMA controller 1
5
Available
6
Available
7
Available