82801FB Datasheet, PDF (446/786 Pages) Intel Corporation – Intel I/O Controller Hub 6 (ICH6) Family

IDE Controller Registers (D31:F1)
Bit
Description
Drive 1 DMA Timing Enable (DTE1) — R/W.
7
0 = Disable.
1 = Enable the fast timing mode for DMA transfers only for this drive. PIO transfers to the IDE data
port will run in compatible timing.
Drive 1 Prefetch/Posting Enable (PPE1) — R/W.
6
0 = Disable.
1 = Enable Prefetch and posting to the IDE data port for this drive.
Drive 1 IORDY Sample Point Enable (IE1) — R/W.
5
0 = Disable IORDY sampling for this drive.
1 = Enable IORDY sampling for this drive.
Drive 1 Fast Timing Bank (TIME1) — R/W.
0 = Accesses to the data port will use compatible timings for this drive.
4
1 = When this bit = 1 and bit 14 = 0, accesses to the data port will use bits 13:12 for the IORDY
sample point, and bits 9:8 for the recovery time. When this bit = 1 and bit 14 = 1, accesses to
the data port will use the IORDY sample point and recover time specified in the slave IDE
timing register.
Drive 0 DMA Timing Enable (DTE0) — R/W.
3
0 = Disable
1 = Enable fast timing mode for DMA transfers only for this drive. PIO transfers to the IDE data
port will run in compatible timing.
Drive 0 Prefetch/Posting Enable (PPE0) — R/W.
2
0 = Disable prefetch and posting to the IDE data port for this drive.
1 = Enable prefetch and posting to the IDE data port for this drive.
Drive 0 IORDY Sample Point Enable (IE0) — R/W.
1
0 = Disable IORDY sampling is disabled for this drive.
1 = Enable IORDY sampling for this drive.
Drive 0 Fast Timing Bank (TIME0) — R/W.
0
0 = Accesses to the data port will use compatible timings for this drive.
1 = Accesses to the data port will use bits 13:12 for the IORDY sample point, and bits 9:8 for the
recovery time
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Intel^® I/O Controller Hub 6 (ICH6) Family Datasheet