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Register Description
R
44 Intel
®
82845 MCH for SDR Datasheet
Address
Offset
Register
Symbol
Register Name Default
Value
Access
87–8Bh — Reserved. — —
8C–8Fh EAP Error Address Pointer 00000000h RO
90–96h PAM[0:6] Programmable Attribute Map (7 Registers) 0000000000
0000h
RO, R/W
97h FDHC Fixed DRAM Hole Control 00h R/W
98–9Ch — Reserved. — —
9Dh SMRAM System Management RAM Control 02h RO, R/W,
R/W/L
9Eh ESMRAMC Extended System Mgmt RAM Control 38h RO, R/W,
R/WC,
R/W/L
9Fh — Reserved. — —
A0–A3h ACAPID AGP Capability Identifier 00200002h RO
A4–A7h AGPSTAT AGP Status 1F000216h RO
A8–ABh AGPCMD AGP Command 00000000h R/W
AC–AFh — Reserved. — —
B0–B3h AGPCTRL AGP Control 00000000h R/W
B4h APSIZE Aperture Size 00h R/W
B5–B7h — Reserved — —
B8–BBh ATTBASE Aperture Translation Table Base 00000000h R/W
BCh AMTT AGP MTT Control 00h R/W
BDh LPTT AGP Low Priority Transaction Timer 00h R/W
BE–C3h Reserved
C4–C5h TOM Top of Low Memory 0000h R/W
C6–C7h MCHCFG MCH Configuration 0000h R/W, RO
C8–C9h ERRSTS Error Status 0000h R/WC
CA–CBh ERRCMD Error Command 0000h R/W
CC–CDh SMICMD SMI Command 0000h R/W
CE–CFh SCICMD SCI Command 0000h R/W
D0–DDh — Reserved. — —
DE–DFh SKPD Scratchpad Data 0000h R/W
E0–E3h — Reserved. — —
E4–E7h CAPID Product Specific Capability Identifier F104A009h RO
E8–FFh — Reserved. — —