Bitfields for Intel 82434LX/NX Frame Buffer Range register |
| Bit | Description |
|---|---|
|
31 - 20 |
buffer offset (in 1MB increments; must be multiple of buffer set set by bits 3-0) |
|
19 - 14 |
reserved |
|
13 |
enable byte merging |
|
12 |
128K VGA-range Attribute Enable when set, bits 13,9,7 also apply to VGA memory range (Axxxx-Bxxxx) |
|
11 - 10 |
reserved |
|
9 |
no lock requests |
|
8 |
reserved |
|
7 |
enable transparent bufer writes |
|
6 - 4 |
reserved |
|
3 - 0 |
buffer size in MB (less 1); must be power of 2 |
|
Note: |
If bits 31-20=0, the frame buffer feature is disabled. |
|
See Also: |