Graphics Aperture Size; Bit I/O Recovery Time - MSI MS-6135 User Manual

USWC Write Post
Set this option to Enabled to use USWC(Uncacheable, Speculatable,
Write-Combined) memory. The settings are Enabled or Disabled. The
Optimal and Fail-Safe default settings are Disabled.

Graphics 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.
Search for MDA Resources
This option is only used for MDA resources. The default setting is
no.

8 Bit I/O Recovery Time

The recovery time is the length of time, measured in CPU clocks,
which the system will delay after the completion of an input/output request.
This delay takes place because the CPU is operating so much faster than the
input/output bus that the CPU must be delayed to allow for the completion
of the I/O.
This item allows you to determine the recovery time allowed for 8 bit
I/O. Choices are from NA, 1 to 8 CPU clocks.
16 Bit I/O Recovery Time
This item allows you to determine the recovery time allowed for 16 bit
I/O. Choices are from NA, 1 to 4 CPU clocks.
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