Intel i7-3920XM Extreme AW8063801009607 用户手册
产品代码
AW8063801009607
Processor Configuration Registers
74
Datasheet, Volume 2
1
RW
0b
Uncore
PEG11 MDA Present (MDAP11)
This bit works with the VGA Enable bits in the BCTRL register of
This bit works with the VGA Enable bits in the BCTRL register of
Device 1 Function 1 to control the routing of processor initiated
transactions targeting MDA compatible I/O and memory address
ranges. This bit should not be set if Device 1 Function 1 VGA
Enable bit is not set.
If Device 1 Function 1 VGA enable bit is not set, then accesses to
If Device 1 Function 1 VGA enable bit is not set, then accesses to
I/O address range x3BCh-x3BFh remain on the backbone.
If the VGA enable bit is set and MDA is not present, then
If the VGA enable bit is set and MDA is not present, then
accesses to I/O address range x3BCh-x3BFh are forwarded to PCI
Express* through Device 1 Function 1 if the address is within the
corresponding IOBASE and IOLIMIT, otherwise they remain on
the backbone.
MDA resources are defined as the following:
MDA resources are defined as the following:
Memory:
0B0000h–0B7FFFh
I/O:
3B4h, 3B5h, 3B8h, 3B9h, 3BAh, 3BFh,
(including ISA address aliases, A[15:10] are not
(including ISA address aliases, A[15:10] are not
used in decode)
Any I/O reference that includes the I/O locations listed above, or
their aliases, will remain on the backbone even if the reference
also includes I/O locations not listed above.
The following table shows the behavior for all combinations of
The following table shows the behavior for all combinations of
MDA and VGA:
VGAEN
MDAP
Description
0
0
All References to MDA and VGA space are
not claimed by Device 1 Function 1.
0
1
Illegal combination
1
0
All VGA and MDA references are routed to
PCI Express Graphics Attach Device 1
Function 1.
1
1
All VGA references are routed to PCI
Express Graphics Attach Device 1 Function
1. MDA references are not claimed by
Device 1 Function 1.
VGA and MDA memory cycles can only be routed across PEG11
when MAE (PCICMD11[1]) is set. VGA and MDA I/O cycles can
only be routed across PEG11 if IOAE (PCICMD11[0]) is set.
B/D/F/Type:
0/0/0/PCI
Address Offset:
87h
Reset Value:
00h
Access:
RW
Size:
8 bits
BIOS Optimal Default
0h
Bit
Access
Reset
Value
RST/
PWR
Description