AMD Geode SC1201 User Manual
Page 299
AMD Geode™ SC1200/SC1201 Processor Data Book
299
Core Logic Module - ISA Legacy Register Space
32579B
I/O Port 0D0h (R/W)
Read
DMA Status Register, Channels 7:4
Note:
Channels 5, 6, and 7 are not supported.
7
Channel 7 Request. Indicates if a request is pending.
0: No.
1: Yes.
6
Channel 6 Request. Indicates if a request is pending.
0: No.
1: Yes.
5
Channel 5 Request. Indicates if a request is pending.
0: No.
1: Yes.
4
Undefined.
3
Channel 7 Terminal Count. Indicates if TC was reached.
0: No.
1: Yes.
2
Channel 6 Terminal Count. Indicates if TC was reached.
0: No.
1: Yes.
1
Channel 5 Terminal Count. Indicates if TC was reached.
0: No.
1: Yes.
0
Undefined.
Write
DMA Command Register, Channels 7:4
Note:
Channels 5, 6, and 7 are not supported.
7
DACK Sense.
0: Active low.
1: Active high.
6
DREQ Sense.
0: Active high.
1: Active low.
5
Write Selection.
0: Late write.
1: Extended write.
4
Priority Mode.
0: Fixed.
1: Rotating.
3
Timing Mode.
0: Normal.
1: Compressed.
2
Channels 7:4.
0: Disable.
1: Enable.
1:0
Reserved. Must be set to 0.
Table 6-43. DMA Channel Control Registers (Continued)
Bit
Description