307013-003 Datasheet, PDF (609/848 Pages) Intel Corporation – Intel I/O Controller Hub 7

IDE Controller Registers (D31:F1)
Bit
Description
7
(Desktop
and
Mobile
Only)
Drive 1 DMA Timing Enable (DTE1) — R/W.
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.
6
(Desktop
and
Mobile
Only)
Drive 1 Prefetch/Posting Enable (PPE1) — R/W.
0 = Disable.
1 = Enable Prefetch and posting to the IDE data port for this drive.
5
(Desktop
and
Mobile
Only)
Drive 1 IORDY Sample Point Enable (IE1) — R/W.
0 = Disable IORDY sampling for this drive.
1 = Enable IORDY sampling for this drive.
4
(Desktop
and
Mobile
Only)
Drive 1 Fast Timing Bank (TIME1) — R/W.
0 = Accesses to the data port will use compatible timings for this drive.
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.
7:4
(Ultra
Mobile
Only)
Reserved
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
Intel ^® ICH7 Family Datasheet
609