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Intel
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82854 Graphics Memory Controller Hub (GMCH)
98 D15343-003
4.10.11 CAPPTR – Capabilities Pointer Register
The CAPPTR provides the offset that is the pointer to the location of the first device capability in
the capability list.
4.10.12 HPLLCC – HPLL Clock Control Register (Device #0)
Address Offset:
Default Value:
Access:
Size:
34h
00h
Read Only
8 bits
Bit Descriptions
7:0 Pointer to the offset of the first capability ID register block: In this case there are no
capabilities therefore these bits are hardwired to 00h to indicate the end of the capability-linked
list.
Address Offset:
Default Value:
Access:
Size:
C0-C1h
00h
Read Only
16 bits
Bit Descriptions
15:11 Reserved
10 HPLL VCO Change Sequence Initiate Bit:
Software must Write a 0 to clear this bit and then Write a 1 to initiate sequence again.
9 Hphase Reset Bit:
1 = Assert
0 = Deassert (default)
8 Reserved
7:2 Reserved
1:0 HPLL Clock Control:
Software is allowed to update this register.
See Table 24.