System I/O Map - DIGITAL-LOGIC MICROSPACE PCC-P5 Technical User's Manual

DIGITAL-LOGIC AG

4.8.3 System I/O Map

The following table shows the detailed listing of the I/O port assignments used in the MICROSPACE board:
I/O Ad- Read/Write
dress Status
0000h R / W
0001h R / W
0002h R / W
0003h R / W
0004h R / W
0005h R / W
0006h R / W
0007h R / W
0008h R
Description
DMA channel 0 address byte 0 (low), then byte 1
DMA channel 0 word count byte 0 (low), then byte 1
DMA channel 1 address byte 0 (low), then byte 1
DMA channel 1 word count byte 0 (low), then byte 1
DMA channel 2 address byte 0 (low), then byte 1
DMA channel 2 word count byte 0 (low), then byte 1
DMA channel 3 address byte 0 (low), then byte 1
DMA channel 3 word count byte 0 (low), then byte 1
DMA channel 0-3 status register
bit 7 = 1 Channel 3 request
bit 6 = 1 Channel 2 request
bit 5 = 1 Channel 1 request
bit 4 = 1 Channel 0 request
bit 3 = 1 Terminal count on channel 3
bit 2 = 1 Terminal count on channel 2
bit 1 = 1 Terminal count on channel 1
bit 0 = 1 Terminal count on channel 0
42
PCCP5 Manual V2.3
Continued...