82C836 Datasheet, PDF (107/205 Pages) List of Unclassifed Manufacturers – Single-Chip 386sx AT

Section 9
Address Maps
I/O Address Maps
The following Tables identify the I/O Ports used in the 82C836. For information
regarding reserved locations, consult the IBM PC/AT Technical Reference Manual.
Table 9-1. DMA Controller I
I/O Address
0000H
0001H
0002H
0003H
0004H
0005H
0006H
0007H
0008H
0009H
000AH
000BH
000CH
000DH
000EH
000FH
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Description
DMA Channel 0 Current Address
DMA Channel 0 Current Word Count
DMA Channel 1 Current Address
DMA Channel 1 Current Word Count
DMA Channel 2 Current Address
DMA Channel 2 Current Word Count
DMA Channel 3 Current Address
DMA Channel 3 Current Word Count
Command/Status Register
DMA Request Register
DMA Single Bit Mask Register
DMA Mode Register
DMA Clear Byte Pointer
DMA Master Clear
Clear Mask Register
DMA Write All Mask Register Bit
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PRELIMINARY
Revision 3.0 9-1