PLI9080 Datasheet, PDF (54/133 Pages) List of Unclassifed Manufacturers – PCI I/O ACCELERATOR

SECTION 4
PCI 9080
REGISTERS
4.2.4 DMA Registers
Table 4-8. DMA Registers
PCI
(Offset
from Base
Address)
80h
84h
88h
8Ch
90h
94h
98h
9Ch
A0h
A4h
A8h
Local
Access
(Offset
from Chip
Select
Address)
100h
104h
108h
10Ch
110h
114h
118h
11Ch
120h
124h
128h
ACh
12Ch
B0h
130h
To ensure software compatibility with other versions of the PCI 9080 family and to
ensure compatibility with future enhancements, write a zero to all unused bits.
31
0
DMA Ch 0 Mode
DMA Ch 0 PCI Address
DMA Ch 0 Local Address
DMA Ch 0 Transfer Byte Count
DMA Ch 0 Descriptor Pointer
DMA Ch 1 Mode
DMA Ch 1 PCI Address
DMA Ch 1 Local Address
DMA Ch 1 Transfer Byte Count
DMA Ch 1 Descriptor Pointer
Reserved
DMA Channel 1
Command/Status
Register
DMA Channel 0
Command/Status
Register
Local/DMA Arbitration Register
DMA Threshold Register
PCI/Local
Writable
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
EEPROM
Writable
N
N
N
N
N
N
N
N
N
N
N
N
N
©PLX Technology, Inc., 1997
Page 46
Version 0.93