Advantech PCA-6145B Manual page 82

Code Name
01 Processor test 1
02 Processor test 2
03 Initialize chips
04 Test memory
Refresh toggle
05 Blank video
06 Reserved
07 Test CMOS interface
08 Setup low memory
09 Early cache initialization
0A Setup interrupt vectors
0B Test CMOS RAM
PCA-6145 User's Manual
Description of check-point
Processor status (IFLAGS) verifica-
tion 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.
Read, write, verify all CPU registers
except SS, SP, and BP with data
pattern FF and 00.
Disable NMI, PLE, ALE, UEL,
SQWV. Disable video, parity check-
ing, DMA. Reset math coprocessor,
clear all page registers, CMOS
shutdown byte. Initialize timer 0, 1,
and 2. Set EISA timer to a known
state. Initialize DMA controllers 0
and 1. Initialize interrupt controllers
0 and 1. Initialize EISA extended
registers.
RAM must be periodically refreshed
in order to keep the memory from
decaying.
This function assures that the mem-
ory refresh function is working prop-
erly.
Keyboard controller initialization.
Initialize keyboard.
Verifies CMOS is working correctly.
Checks battery status, detects bad
battery.
Early chip set initialization memory
presence test. OEM chipset rou-
tines. Clear low 64 KB of memory.
Test first 64 KB memory.
Cyrix CPU initialization, cache ini-
tialization
Initialize first 120 vectors in inter-
rupt vector table with
SPURIOUS_INT_HDLR and initial-
ize INT 00h-1Fh according to
INT_TBL.
Test CMOS RAM checksum. If bad
or insert key pressed, INT OOh-1Fh
according to INT_TBL.
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