82801DB Datasheet, PDF (293/587 Pages) Intel Corporation – Intel 82801DB I/O Controller Hub 4 (ICH4)

LPC Interface Bridge Registers (D31:F0)
9.1.3
PCICMD—PCI COMMAND Register (LPC I/F—D31:F0)
Offset Address:
Default Value:
Lockable:
04–05h
000Fh
No
Attribute:
Size:
Power Well:
R/W, RO
16 bit
Core
Bit
15:10
9
8
7
6
5
4
3
2
1
0
Description
Reserved
Fast Back to Back Enable (FBE) — RO. Hardwired to 0.
SERR# Enable (SERR_EN) — R/W.
0 = Disable.
1 = Enable. Allow SERR# to be generated.
Wait Cycle Control (WCC) — RO. Hardwired to 0.
Parity Error Response (PER) — R/W.
0 = No action is taken when detecting a parity error.
1 = The Intel^® ICH will take normal action when a parity error is detected.
VGA Palette Snoop (VPS) — RO. Hardwired to 0
Postable Memory Write Enable (PMWE) — RO. Hardwired to 0
Special Cycle Enable (SCE) — Hardwired to 1.
Bus Master Enable (BME) — RO. Hardwired to 1 to indicate that bus mastering cannot be disabled
for function 0 (DMA/ISA Master)
Memory Space Enable (MSE) — RO. Hardwired to 1 to indicate that memory space cannot be
disabled for Function 0 (LPC I/F)
I/O Space Enable (IOSE) — RO. Hardwired to 1 to indicate that the I/O space cannot be disabled
for function 0 (LPC I/F)
Intel^® 82801DB ICH4 Datasheet
293