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6 Tests and Error Messages
Order in Which POST Tests Are Performed
2Ch RAM failure on address line
1
RAM Add. Failure
2Eh RAM failure on data bits xxxx
1
of low byte of memory bus RAM Data Low
2Fh Enable cache before system BIOS shadow
30h RAM failure on data bits xxxx
1
of high byte of memory bus RAM Data High
32h Test CPU bus-clock frequency
33h Initialize POST Dispatch Manager
36h Warm start shut down
38h Shadow system BIOS ROM Shadow BIOS
ROM
3Ah Autosize cache
3Ch Advanced configuration of chipset registers
3Dh Load alternate registers with CMOS values
42h Initialize interrupt vectors
45h POST device initialization
46h Check ROM copyright notice
48h Check video configuration against CMOS
49h Initialize PCI bus and devices PCI Detection 5
4Ah Initialize all video adapters in system Video Detection 4
4Bh Display QuietBoot screen (optional)
4Ch Shadow video BIOS ROM
4Eh Display BIOS copyright notice
50h Display CPU type and speed
51h Initialize EISA board
52h Test keyboard Keyboard Test
54h Set key click if enabled
Checkpoint
Code
POST Routine Description
MaxiLife LCD
Display
Message
Beep
Codes