AP0 USER’S MANUAL
3-13
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I/O Recovery Period
I/O Recovery
Period:
- 1us
- 2us
- 3us
The peripheral controller insert a minimum of 2 bus
clock (BCLK) delays between back-to-back 8- or 16-
bit ISA I/O cycles issued from the PCI master.
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VGA Frame Buffer
VGA Frame
Buffer:
-Disabled
-1 MB
-2 MB
-4 MB
-8 MB
-16MB
When Enabled, a fixed VGA frame buffer from A000h
to BFFFh and a CPU-to-PCI write buffer are
implemented.
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Video BIOS Cacheable
Video BIOS
Cacheable:
- Enabled
- Disabled
Selecting Enabled allows caching of the video BIOS
ROM at C0000h to C7FFFh, resulting in better video
performance. However, if any program writes to this
memory area, a system error may result.
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Video RAM Cacheable
Video RAM
Cacheable:
- Enabled
- Disabled
Selecting Enabled allows caching of the video BIOS
ROM at C0000h to C7FFFh, resulting in better video
performance. However, if any program writes to this
memory area, a memory access error may result.