Abit WB6 User Manual page 53

BIOS Setup 3-21
Delayed Transaction:
Two options are available: Enabled and Disabled. The default setting is Disabled. Set the
option to enabled or disabled PCI 2.1 features including passive release and delayed
transaction for the chipset. This function is used to meet the latency of PCI cycles to or from
the ISA bus. This option must be enabled to provide PCI 2.1 compliance. If you have an ISA
card compatibility problem, you can try to enable or disable this option for optimal results.
On-Chip Video Window Size:
Three options are available: 64MB , 32MB , Disabled , Back to 64MB. The default
setting is 64MB. This option specifies the amount of system memory that can be used by the
AGP graphic data.
Local Memory Frequency:
Two options are available: 100 MHz and 133 MHz. The default setting is 100 MHz. You can
choose the running speed for local memory, but if your memory module does not support the
speed you choose, it may cause a system boot failure or data loss problem.
Onboard Display Cache Setting:
When using the onboard VGA function, you had best use the default setting.
CAS# Latency:
Two options are available: 2 and 3. The default setting is 3. You can select the local memory
clock periods.
Paging Mode Control:
Two options are available: Close and Open. The default setting is Open. You can select the
paging mode control to open or close.
RAS-to-CAS Override:
Two options are available: by CAS# LT and Override (2). The default setting is by CAS# LT.
This is the display cache clock period control.
RAS# Timing:
Two options are available: Slow and Fast. The default setting is Fast. This item controls
RAS# active to Protegra, and refresh to RAS# active delay (in local memory area).
RAS# Precharge Timing:
Two options are available: Slow and Fast. The default setting is Fast. This item controls
RAS# precharge (in local memory area).
User's Manual