- Tyan User's Manual Switch GX21, B5102

Active to Precharge Delay

This setting is the number of clock cycles needed after a bank

active command before a precharge can occur. The possible

values are:

8 / 7 / 6 / 5

DRAM RAS# to CAS# Delay

This setting is the number of cycles from when a bank acti-

vate command is issued until a read or write command is

accepted, that is, before the CAS becomes active. The possi-

ble values are:

4 / 3 / 2

DRAM RAS# Precharge

This setting is the number of cycles needed to return data to

its original location to close the bank or number of cycles to

page memory before the next bank activate command can be

issued. The possible values are:

4 / 3 / 2

System BIOS Cacheable

Enabling this option will cause the BIOS code from ROM to

be copied on to the much faster RAM at location F0000h-

FFFFFh, thus increasing system performance. However, if

any program writes to this memory area, a system error may

result. The choices are:

Disabled / Enabled

VIDEO BIOS Cacheable

Enabling this option will cause the VIDEO BIOS code from

the video adapter’s ROM to be copied on to the much faster

RAM, thus increasing system performance. However, if any

program writes to this memory area, a system error may

result. The choices are:

Disabled / Enabled