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Intel
82865G/82865GV GMCH Datasheet
131
Register Description
3.9.9
BAR6—Memory Delays Base Address Register (Device 6)
Address Offset:
Default Value:
Access:
Size:
10–13h
00000000h
RO, R/W
32 bits
This register is a standard PCI scheme to claim a memory-mapped address range. This memory-
mapped address range can be enabled once the relevant enable bit in the PCI command register is
set to 1.
3.9.10
SVID6—Subsystem Vendor Identification Register
(Device 6)
Address Offset:
Default Value:
Access:
Size:
2C–2Dh
0000h
R/WO
16 bits
This value is used to identify the vendor of the subsystem.
3.9.11
SID6—Subsystem Identification Register (Device 6)
Address Offset:
Default Value:
Access:
Size:
2E–2Fh
0000h
R/WO
16 bits
This value is used to identify a particular subsystem.
Bit
Descriptions
31:12
Memory base Address—R/W.
Set by the OS, these bits correspond to address signals [31:13].
11:4
Address Mask—RO.
Hardwired to 00h to indicate 4-KB address range is reserved for memory-
mapped address space.
3
Prefetchable—RO.
This read only bit indicates the prefetchability of the requested memory
address range.
0 = Not prefetchable. The memory range is not prefetchable and may have read side effects.
1 = Prefetchable. The memory address range is prefetchable (i.e., has no read side effects and
returns all bytes on reads regardless of byte enables) and byte merging of write transactions
is allowed.
2:1
Memory Type (TYPE)—RO.
Hardwired to 00b to indicate that address range defined by the upper
bits of this register can be located anywhere in the 32-bit address space as per the PCI
specification for base address registers.
0
Memory Space Indicator (MSPACE)—RO.
Hardwired to 0 to identify memory space.
Bit
Descriptions
15:0
Subsystem Vendor ID (SUBVID)—R/WO.
This field should be programmed during boot-up to
indicate the vendor of the system board. After it has been written once, it becomes read only.
Bit
Descriptions
15:0
Subsystem ID (SUBID)—R/WO.
This field should be programmed during BIOS initialization. After it
has been written once, it becomes read only.