Gigabyte GA - 586ATX, User Manual

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Appendix B: Post Codes
B-2
8 Setup low memory Early chip set initialization.
Memory presence test.
OEM chip set routines.
Clear low 64 K of memory.
Test first 64 K memory.
9 Early Cache
Initialization Cyrix CPU initialization.
Cache initialization.
A Setup Interrupt
Vector Table Initialize first 120 interrupt vectors with
SPURIOUS_INT-HDLR and initialize INT 00h-1Fh
according to INT_TBL.
B Test CMOS RAM
Checksum Test CMOS RAM Checksum, if bad, or insert key
pressed, load defaults.
C Initialize keyboard Detect type of keyboard controller (optional).
Set NUM_LOCK status.
D Initialize Video
Interface Detect CPU clock.
Read CMOS location 14h to find out type of video in
use.
Detect and Initialize Video Adapter.
E Test Video Memory Test video memory, write sign-on message to screen.
Setup shadow RAM - Enable shadow according to
Setup.
F Test DMA
Controller 0 BIOS checksum test.
Keyboard detect and initialization.
10 Test DMA
Controller 1
11 Test DMA Page
registers Test DMA Page Registers.
12-13 Reserved
14 Test Timer Counter
2 Test 8254 Timer 0 Counter 2.
15 Test 8259-1 Mask
Bits Verify 8259 Channel 1 masked interrupts by alternately
turning off and on the interrupt lines.
16 Test 8259-2 Mask
Bits Verify 8259 Channel 2 masked interrupts by alternately
turning off and on the interrupt lines.
17 Test Stuck 8259's
Interrupt Bits Turn off interrupts then verify no interrupt mask
register is on.
18 Test 8259 Interrupt
Functionality Force an interrupt and verify the interrupt occurred.