AWARD BIOS SETUP
EM586 / 43
DRAM Timing : The value in this field depends on the performance parameters of the
installed memory chips (DRAM). Do not change the value from the factory settings
unless you install new memory that has a different performance rating than the original
DRAMs.
DRAM Leadoff Timing : Select the combination of CPU clocks the DRAM on your board
requires before each reach from or write to the memory. Changing the value from the
setting determined by the board designer for the installed DRAM may cause memory
errors.
DRAM Read Burst (EDO/FP) : Sets the timing for reads from EDO (Extended Data
Output) or FPM (Fast Page Mode) memory. The lower the timing numbers, the faster
the system addresses memory. Selecting timing numbers lower than the installed
DRAM is able to support can result in memory errors.
DRAM Write Burst Timing : Your system designer should select the timing that the
system uses when reading from and writing to DRAM. Do not reset from the factory
default value.
Fast EDO Lead Off : Select Enabled only for EDO DRAMs in either a synchronous
cache or a cacheless system. It causes a 1-HCLK pull-in for all read leadoff latencies
for EDO DRAMs (i.e., page hits, page misses, and row misses). Select Disabled if any
of the DRAM rows are populated with FPM DRAMs.
Refresh RAS# Assertion : Select the number of clock cycles in which RAS# is asserted
for refresh cycles.
SDRAM RAS to CAS Delay : This field lets you insert a timing delay between the CAS
and RAS strobe signals, used when DRAM is written to, read from, or refreshed. Fast
gives faster performance; and Slow gives more stable performance. This field applies
only when synchronous DRAM is installed in the system.
SDRAM RAS Precharge Time : If insufficient number of cycles is allowed for the RAS to
accumulate its charge before DRAM refresh, the refresh may be incomplete and the
DRAM may fail to retain data. Fast gives faster performance; and Slow gives more
stable performance. This field applies only when synchronous DRAM is installed in the
system.
