74 PCA-6145B/6145L User's Manual
Code Name Description of check-point
01 Processor test 1 Processor status (IFLAGS) verification
tests the following processor status flags,
carry, zero, sign, BIOS overflow. It will set
each of these flags, verify that they are set,
then turn each flag off and verify it is off.
02 Processor test 2 Read, write, verify all CPU registers except
SS, SP, and BP with data pattern FF and
00.
03 Initialize chips Disable NMI, PLE, ALE, UEL, SQWV.
Disable video, parity checking, DMA.
Reset math coprocessor, clear all page
registers, CMOS shutdown byte. Initialize
timer 0, 1, and 2. Set EISA timer to a
known state. Initiallze DMA controllers 0
and 1. Initialize interrupt controllers 0 and
1. Initialize EISA extended registers.
04 Test memory RAM must be periodically refreshed in
order to keep the memory from decaying.
Refresh toggle This function assures that the memory
refresh function is working properly.
05 Blank video Keyboard controller initialization. Initialize
keyboard.
06 Reserved
07 Test CMOS interface Verifies CMOS is working correctly.
Checks battery status, detects bad battery.
08 Setup low memory Early chip set initialization memory
presence test. OEM chipset routines.
Clear low 64 KB of memory. Test first 64
KB memory.
09 Early cache initialization Cyrix CPU initialization, cache initialization
0A Setup interrupt vectors Initialize first 120 vectors in interrupt vector
table with SPURIOUS_INT_HDLR and
initialize INT 00h-1Fh according to
INT_TBL.
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