User manual

BIOS Setup
57
POST
Code
(Hex)
Name Description
58h
HOT_INT
Check for unexpected interrupts.
Check for unexpected NMI.
Enable parity checkers and check for
unexpected NMI.
59h
PDS_INIT
Register POST display services with
POST Dispatch Manager.
5Bh
CPU_CACHE_OFF
Disable and WB invalidate CPU cache.
5Ch
MEMORY_TEST
Determine amount of memory below 1M.
Walk a1 through data bus at 80000h.
walk a 0 through data bus at 80000h.
Check for stuck address line from 80000h
to 8FFFFh.
60h
EXT_MEMORY
Determine total amount of memory by
doing a read/write test.
For each 1M block oh memory:
Walk a 1 through data bus at first location
of block.
Walk a 0 through data bus at first location
of block.
Check for stuck address line in the block.
62h
EXT_ADDR
Do an extended address line test on the
entire memory range.
64h
USERPATCH
Code that is patched into the ROM can
be set up to execute at this point.
66h
CACHE_ADVNCD
Load L2 cache controller configuration
registers with values from setup screens.
68h
CACHE_CONFIG
Set non-cacheable regions.
Enable L1 and L2 caches.
6AH
DISP_CACHE
IF <cache RAM size not zero> THEN
Display L2 cache RAM size on screen.
ENDIF
6Ch
DISP_SHADOW
IF <system BIOS ROM shadowed>
THEN
Display message indicating that the
system BIOS
ROM is shadowed.
ENDIF
IF <video BIOS ROM shadowed> THEN
Display message indicating that the
video BIOS
ROM is shadowed.
ENDIF