User's Manual

Intel® 815 Chipset: Graphics Controller PRM, Rev 1.0
R
319
16.1.17. MEM_MODE—Memory Interface Mode Register (debug)
Address Offset: 020DCh
Default Value: 00000000h
Access: Read/Write
Size: 32 bits
15 8
Reserved
7 6 5 4 3 2 1 0
Other Local Cache
Modes
Host
Graphics
Prefetch
Enable
Reserved Reserved Graphics
Address
Translatio
n Mode
(Pg Tbl
test mode)
Enable
Instruction
FIFO
Debug
Mode
Bit Description
31:6 Reserved.
5 Host Graphics Prefetch Mode,
0 = Enable
1 = Disable
4:3 Reserved
2 Reserved. MUST BE SET TO 1
1 Graphics Address Translation Mode.
0 = Graphics Address translated through page table (Page Table test mode)
1 = Graphics address = Physical address in Local memory. (Not supported in the GMCH)
0 Instruction FIFO Debug Mode.
0 = Disable
1 = Enable