Energy Star Compliant System Board
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Appendix B: System Error Report
Description
OEM specific-cache control.
Processor status (1FLAGS) verification.
Test the following processor status flags
carry, zero, sign, overflow.
The BIOS will set each of these flags,
verify 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, PIE, AIE, UEI, SQWV.
Disable video, parity checking, DMA.
Reset math coprocessor.
Clear all page registers, CMOS
shutdown byte.
Initialize timer 0, 1 and 2, including 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 memory
refresh function is working properly.
Keyboard controller initialization.
Verifies CMOS is working correctly,
detects bad battery.
POST (hex)
C0
1
2
3
4
5
6
7
Name
Turn off chipset
cache
Processor test 1
Processor test 2
Initialize chips
Test memory refresh
toggle
Blank video, initialize
keyboard
Reserved
Test CMOS interface
and battery status
B-1
u
Appendix B