ECS L4S5M Manual page 36

System Performance (Normal Mode)
This is the DRAM auto configuration option, which can be set to Safe Mode,
Normal Mode, Fast Mode or Ultra Mode.
CAS Latency Setting (2.5T)
Enables you to select the CAS latency time in HCLKs of 2, 2.5, or 3. The
value is set at the factory depending on the DRAM installed. Do not change
the values in this field unless you change specifications of the installed DRAM
or the installed CPU.
Prefetch Caching (Disabled)
Enables PCI slave prefetch caching. Enabling this increased performance.
Memory Hole at 15M-16M (Disabled)
This item is used to reserve memory space for ISA expansion cards that
require it.
AGP Aperture Size (64MB)
This item defines the size of the aperture if you use an AGP graphics adapter.
It refers to a section of the PCI memory address range used for graphics
memory. We recommend that you leave this item at the default value.
Graphic Window WR Combin (Enabled)
This item determines whether the graphic windows base address is valid or
not.
LeadOff Dram R/W Command (Delay 1T)
This option allows you to set the lead off DRAM read and write cycles. When
set to Delay 1T, memory read/write commands are sent one clock cycle
behind the memory address. When set to Normal, read/write and memory
address commands are sent simultaneously.
LeadOff Dram B/G Command (Delay 1T)
This option allows you to set the lead off DRAM background commands.
When set to Delay 1T, the memory background commands are sent one clock
cycle behind the memory address. When set to Normal, background
commands are sent simultaneously.
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