Product specifications

CN333 Data Sheet
Revision 1.0, January 5, 2005 -52- Device 0 Function 3 Register Descriptions - DRAM
ROM Shadow Control
Offset 80 – C-ROM Shadow Control (00h) RW
7-6 CC000h-CFFFFh
00 Read/write disable..................................default
01 Write enable
10 Read enable
11 Read/write enable
5-4 C8000h-CBFFFh
00 Read/write disable..................................default
01 Write enable
10 Read enable
11 Read/write enable
3-2 C4000h-C7FFFh
00 Read/write disable..................................default
01 Write enable
10 Read enable
11 Read/write enable
1-0 C0000h-C3FFFh
00 Read/write disable..................................default
01 Write enable
10 Read enable
11 Read/write enable
Offset 81 – D-ROM Shadow Control (00h).....................RW
7-6 DC000h-DFFFFh
00 Read/write disable..................................default
01 Write enable
10 Read enable
11 Read/write enable
5-4 D8000h-DBFFFh
00 Read/write disable..................................default
01 Write enable
10 Read enable
11 Read/write enable
3-2 D4000h-D7FFFh
00 Read/write disable..................................default
01 Write enable
10 Read enable
11 Read/write enable
1-0 D0000h-D3FFFh
00 Read/write disable..................................default
01 Write enable
10 Read enable
11 Read/write enable
Offset 82 – F-ROM Shadow /Memory Hole / SMI Control
(00h)................................................................................... RW
7-6 Reserved ........................................always reads 0
5-4 F0000h-FFFFFh
00 Read/write disable ................................. default
01 Write enable
10 Read enable
11 Read/write enable
3-2 Memory Hole
00 None .................................................... default
01 512K-640K
10 15M-16M (1M)
11 14M-16M (2M)
1 Disable A,BK SMRAM Direct Access
0 Enable A,BK DRAM Access
SMI Mapping Control:
Bits SMM
Non-SMM
1-0 Code Data Code Data
00 DRAM DRAM PCI PCI
01 DRAM DRAM DRAM DRAM
10 DRAM PCI PCI PCI
11 DRAM DRAM DRAM DRAM
Offset 83 – E-ROM Shadow Control (00h) .................... RW
7-6 EC000h-EFFFFh
00 Read/write disable ................................. default
01 Write enable
10 Read enable
11 Read/write enable
5-4 E8000h-EBFFFh
00 Read/write disable ................................. default
01 Write enable
10 Read enable
11 Read/write enable
3-2 E4000h-E7FFFh
00 Read/write disable ................................. default
01 Write enable
10 Read enable
11 Read/write enable
1-0 E0000h-E3FFFh
00 Read/write disable ................................. default
01 Write enable
10 Read enable
11 Read/write enable