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6 Tests and Error Messages
Order in Which POST Tests Are Performed
F2h Initialize video
F3h Initialize System Management Mode
F4h Output one beep before boot
F5h Boot to Mini DOS
F6h Clear Huge Segment
F7h Boot to Full DOS
1.
If the BIOS detects error 2C, 2E, or 30 (base 512K RAM error), it displays an additional word-bitmap
(xxxx) indicating the address line or bits that failed.For example:
“2C 0002” means line 1 (bit one set) has failed.
“2E 1020” means data bits 12 and 5 (bits 12 and 5 set) have failed in the lower 16 bits.
The BIOS also sends the bitmap to the port-80 LED display. It first displays the checkpoint code,
followed by a delay, the high-order byte, another delay, and then the low-order byte of the error. It
repeats this sequence continuously.
Checkpoint
Code
POST Routine Description
MaxiLife LCD
Display
Message
Beep
Codes