82801CA Datasheet, PDF (374/521 Pages) Intel Corporation – I/O Controller Hub 3-S (ICH3-S)

IDE Controller Registers (D31:F1)
10.1.22
SDMA_CNT—Synchronous DMA Control Register
(IDE—D31:F1)
Address Offset: 48h
Default Value: 00h
Attribute:
Size:
R/W
8 bits
Bit
Description
7:4 Reserved.
Secondary Drive 1 Synchronous DMA Mode Enable (SSDE1)—R/W.
3
0 = Disable (default).
1 = Enable Synchronous DMA mode for secondary channel drive 1.
Secondary Drive 0 Synchronous DMA Mode Enable (SSDE0)—R/W.
2
0 = Disable (default).
1 = Enable Synchronous DMA mode for secondary drive 0.
Primary Drive 1 Synchronous DMA Mode Enable (PSDE1)—R/W.
1
0 = Disable (default).
1 = Enable Synchronous DMA mode for primary channel drive 1.
Primary Drive 0 Synchronous DMA Mode Enable (PSDE0)—R/W.
0
0 = Disable (default).
1 = Enable Synchronous DMA mode for primary channel drive 0.
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Intel^® 82801CA ICH3-S Datasheet