Fastora NA-1531, Руководство по установке оборудования

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NA-1531 / NA-1801 Networking Application Platform Hardware
Installation Guide
Starting the Appliance 44
system.
The Choice: 3, 2.
DRAM RAS# Precharge
If an 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 stab le performance. This field applies only
when synchronous DRAM is installed in the system.
The Choice: 2, 3.
System BIOS Cacheable:
The ROM BIOS can be mapping to the addresses as F0000h
to FFFFFh pass through buffer cache; it can speed up access
time of BIOS. But most of OS doesn’t inquiry through BIOS in
operating, and some of programs maybe occupied the segment
of address. so we recommend the default value should be
disabled.
The Choice: Enabled, Disabled
Memory Hole at 15M-16M:
(Reserved segment of memory for memory.)
Some of expansion adapter card will allocate some segment of
memory in operating. We can release 15M address above to