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Timings programmed into this register are dependent on the system design.
Slower rates may be required in certain system designs to support loose
layouts or slower memory. Setting options: Safe Mode, Normal Mode,
Fast Mode, Turbo Mode, Ultra Mode.
CAS Latency Setting
When synchronous DRAM is installed, the number of clock cycles of
CAS latency depends on the DRAM timing. The settings are: 2T, 2.5T,
3T.
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.
AGP Aperture Size
This setting controls just how much system RAM can be allocated to AGP for
video purposes. The aperture is a portion of the PCI memory address range
dedicated to graphics memory address space. Host cycles that hit the aperture
range are forwarded to the AGP without any translation. The option allows the
selection of an aperture size of 4MB, 8MB, 16MB, 32MB, 64MB, 128MB, and
256 MB.
3-13
BIOS Setup
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