Advantech CompactPCI MIC-3000 Series User Manual page 45

memory area, a system error may result. The settings are: Enabled and Disabled.
Video BIOS Cacheable
Select Enabled allows caching of the video BIOS , resulting in better system
performance. However, if any program writes to this memory area, a system error
may result. The settings are: Enabled and Disabled.
Memory Hole At 15M-16M
You can reserve this area of system memory for ISA adapter ROM. When this area
is reserved, it cannot be cached. The user information of peripherals that need to
use this area of system memory usually discusses their memory requirements. The
settings are: Enabled and Disabled.
Delayed Transaction
The chipset has an embedded 32-bit posted write buffer to support delay
transactions cycles. Select Enabled to support compliance with PCI specification
version 2.1. The settings are: Enabled and Disabled.
AGP Aperture Size
This option determines the effective size of the graphics aperture used in the
particular PAC configuration. The AGP aperture is memory mapped while graphics
data structure can reside in a graphics aperture. The aperture range should be
programmed as not cacheable in the processor cache, accesses with the aperture
range are forwarded to the main memory, then PAC will translate the original issued
address via a translation table that is maintained on the main memory. The option
allows the selection of an aperture size of 4MB, 8MB, 16MB, 32MB, 64MB, 128MB,
and 256MB.
MIC-3366 Series User Manual -- Page 37