82801FB Datasheet, PDF (448/786 Pages) Intel Corporation – Intel I/O Controller Hub 6 (ICH6) Family

IDE Controller Registers (D31:F1)
11.1.23
SDMA_CNT—Synchronous DMA Control Register
(IDE—D31:F1)
Address Offset: 48h
Default Value: 00h
Attribute: R/W
Size:
8 bits
Bit
Description
7:4 Reserved
3:2
No Operation (NOP) — R/W. These bits are read/write for legacy software compatibility, but have no
functionality in the ICH6.
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^® I/O Controller Hub 6 (ICH6) Family Datasheet