Intel i7-3920XM Extreme AW8063801009607 ユーザーズマニュアル
製品コード
AW8063801009607
Datasheet, Volume 2
75
Processor Configuration Registers
0
RW
0b
Uncore
PEG10 MDA Present (MDAP10)
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 0 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 0 VGA
Enable bit is not set.
If Device 1 Function 0 VGA enable bit is not set, then accesses to
If Device 1 Function 0 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 0 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 0.
0
1
Illegal combination
1
0
All VGA and MDA references are routed to
PCI Express Graphics Attach Device 1
Function 0.
1
1
All VGA references are routed to PCI Express
Graphics Attach Device 1 Function 0. MDA
references are not claimed by Device 1
Function 0.
VGA and MDA memory cycles can only be routed across PEG10
when MAE (PCICMD10[1]) is set. VGA and MDA I/O cycles can
only be routed across PEG10 if IOAE (PCICMD10[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