Integrated Graphics Device Registers (D2:F0,F1)
8.1.13
SID2—Subsystem Identification
B/D/F/Type:
Address Offset:
Default Value:
Access:
0/2/0/PCI
2E–2Fh
0000h
RWO
16 bits
Size:
Bit
Access &
Default
Description
15:0
RWO
0000h
Subsystem Identification (SUBID): This value is used to identify a
particular subsystem. This field should be programmed by BIOS during
boot-up. Once written, this register becomes Read Only. This register
can only be cleared by a Reset.
8.1.14
ROMADR—Video BIOS ROM Base Address
B/D/F/Type:
Address Offset:
Default Value:
Access:
0/2/0/PCI
30–33h
00000000h
RO
Size:
32 bits
The IGD does not use a separate BIOS ROM, therefore this register is hardwired to 0s.
Bit
31:18
17:11
10:1
0
Access &
Default
Description
RO
0000h
ROM Base Address (RBA): Hardwired to 0s.
RO
00h
Address Mask (ADMSK): Hardwired to 0s to indicate 256 KB address
range.
RO
000h
Reserved. Hardwired to 0s.
RO
0b
ROM BIOS Enable (RBE):
0 = ROM not accessible.
Datasheet
233
INTEL [ INTEL ]
