82845MP Datasheet, PDF (42/157 Pages) Intel Corporation – Intel 845 Family Chipset-Mobile 82845MP/82845MZ Chipset Memory Controller Hub Mobile (MCH-M)

Intel^®82845MP/82845MZ Chipset-Mobile (MCH-M)
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3.6. Memory Mapped Register Space
All System Memory control functions have been consolidated into a new memory mapped address region
within Device 0 Function 0. This space will be accessed using a new Base Address Register (BAR)
located at Dev 0 Func 0 (Offset 14h). By default this BAR will be invisible (i.e., Read-Only zeros).
Note: All accesses to these Memory Mapped Registers must be made as a single DWORD (4 bytes) or less.
Access must be aligned on a natural boundary.
The high-level breakout of these memory-mapped registers is as follows.
Address
020h-02Bh
2Ch
02Dh-02Fh
030h-034h
040h-0DFh
140h-1DFh
Register Group
Reserved
DRAM Width Register
Reserved
Strength Registers
Reserved
Reserved
42
Datasheet
250687-002