112 PCA-6157 User's Manual
Code
Name
Description of check-point
00
Boot
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
Setup low memory
Early chip set initialization memory
presence test. OEM chipset routines.
Clear low 64 KB of memory. Test first
64 KB memory.
03
Early cache initialization
Cyrix CPU initialization, cache
initialization.
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
Initialize keyboard
detect type of keyboard controller
(optional). Set num_lock status.
07
Initalize video interface
Detect CPU clock. Read interface
CMOS location 14h to find out type of
video in use. Detect and initialize
video adaptor.
08
Processor test 2
Read, write, verify all CPU registers
except SS, SP, and BP with data
pattern FF and 00.
09
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.
