Home ·  Forums ·  About Us ·  Awards ·  Contact Us ·  Upgrade your BIOS
Click to scan for Bios Updates
BIOS PostCodes

Intel Motherboards:

  • Eurosoft/Mylex BIOS Post Codes
  • Eurosoft 4.71 BIOS Post Codes
  • Mylex BIOS Post Codes


Eurosoft/Mylex BIOS Post Codes:

01 CPU test failed
02 DMA page register test failed
03 Keyboard controller test failed
04 BIOS ROM checksum error
05 Keyboard command test failed
06 CMOS RAM test failed
07 RAM refresh test failed
08 First-64KB memory test failed
09 DMA controller test failed
0A Initialize DMA controller
0B Interrupt test failed
0C Checking RAM size
0D Initializing video system
0E Video BIOS checksum failed
10 Search for monochrome video adapter
11 Search for color video adapter
12 Word-splitter and byte-shift test failed
13 Keyboard test failed
14 RAM test failed
15 System timer test failed
16 Initialize keyboard controller output port
17 Keyboard test failed
18 Initialize keyboard
19 Real-time clock test failed
1A Math coprocessor test failed
1B Reset floppy and hard drive controllers
1C Initialize floppy drive
1D Initialize the hard drive
1E Locate adapter ROM's from C800h to DFFFh
1F Locate and initialize serial and parallel ports
20 Initialize time of day in RTC
21 Locate adapter ROM's from E000h to EFFFh
22 Search for boot device
23 Boot from floppy disk
24 Boot from hard disk
25 Gate A20 enable/disable failure
26 Parity error
30 DDNIL bit-scan failure
FF Fatal error...system halted

Return to Top

Eurosoft 4.71 BIOS Post Codes:

03 DMA page registers tested
04 DMA page registers failed
05 Keyboard tested
06 Keyboard test failed
07 Keyboard self-test passed
08 Keyboard self-test failed
09 8042 keyboard controller checking links
0A 8042 keyboard controller unable to read links
0C Keyboard port 60h tested
0D Keyboard failed port 60h test
0E Keyboard parameter tested
0F Keyboard parameter test failed
10 Keyboard command byte read
11 Keyboard command byte failed read
12 Keyboard command byte read OK
13 Keyboard command byte corrupt
14 RAM-refresh toggle switch
15 RAM-refresh clock not correct
16 RAM bit test passed
17 RAM bit test failed
18 RAM parity tested
19 RAM parity error
1A CMOS RAM tested
1B CMOS RAM test failed
1C CMOS battery OK
1D CMOS battery failed
1E CMOS checksum passed
1F CMOS checksum failed
20 CMOS battery fault bit set
21 Master DMA controller 1 tested
21 Slave DMA controller 2 tested
22 Master DMA controller 1 failed
23 Slave DMA controller 2 failed
24 Protected mode entered successfully
25 RAM test completed
26 BIOS RAM checksum tested
27 BIOS RAM checksum test failed
28 Protected mode exit successful
29 Keyboard power-up reply received
2A Keyboard power-up reply missing
2B Keyboard disable command tested
2C Keyboard disable command failed
2D Checking for video system
2E POST errors have been reported
2F About to halt
30 Protected mode entered safely
31 RAM test complete
32 Master interrupt controller (PIC 1) tested
33 Master interrupt controller (PIC 1) failed
34 Slave interrupt controller (PIC 2) tested
35 Slave interrupt controller (PIC 2) failed
36 Chipset initialization
37 Chipset initialization failed
38 BIOS shadowing tested
39 BIOS shadowing failed
3A Video BIOS shadowing tested
3B Video BIOS shadowing failed

Return to Top

Mylex BIOS Post Codes:

01 CPU test
02 DMA page register tested
03 Keyboard controller tested
04 ROM BIOS checksum
05 Send keyboard command test
06 CMOS RAM test
08 RAM-refresh test
09 First-64K memory test
0A DMA controller test
0B Initialize DMA controller
0C Interrupt test
0D Determine RAM size
0E Initialize video and verify EGA or VGA checksum
10 Search for monochrome card
11 Search for color card
12 Word-splitter and byte-shifter test
13 Keyboard tested
14 RAM tested
15 System timer tested
16 Initialize keyboard-controller output port
17 Keyboard-interrupt test

Return to Top

All information has been gathered with permission of the respective BIOS providers. Although Bios Central has used reasonable effort to ensure accuracy we are unable to verify all codes posted. Use at your own risk. Bios Central, or any person associated with Bios Central takes no responsibility for any dmage resulting from the use of this information.

Copyright © 1988 -  by Bob Hurt. All rights reserved. Bios Central is a trademark of Bob Hurt.

System Specific Diagnostic and POST Error Messages:

BIOS Related Pages:

BIOS Beep Codes:

Free Stuff:

My Other Pages: