Beep Code |
Description and what to check |
1-1-1-3 |
Verify Real Mode |
1-1-2-1 |
Get CPU Type |
1-1-2-3 |
Initialize system hardware |
1-1-3-1 |
Initialize chipset registers with initial POST values |
1-1-3-2 |
Set in POST flag |
1-1-3-3 |
Initialize CPU registers |
1-1-4-1 |
Initialize cache to initial POST values |
1-1-4-3 |
Initialize I/O |
1-2-1-1 |
Initialize Power Management |
1-2-1-2 |
Load alternate registers with initial POST values |
1-2-1-3 |
Jump to UserPatch0 |
1-2-2-1 |
Initialize keyboard controller |
1-2-2-3 |
BIOS ROM checksum |
1-2-3-1 |
8254 timer initialization |
1-2-3-3 |
8237 DMA controller initialization |
1-2-4-1 |
Reset Programmable Interrupt Controller |
1-3-1-1 |
Test DRAM refresh |
1-3-1-3 |
Test 8742 Keyboard Controller |
1-3-2-1 |
Set ES segment to register to 4 GB |
1-3-3-1 |
28 Autosize DRAM |
1-3-3-3 |
Clear 512K base RAM. |
1-3-4-1 |
Test 512 base address lines |
1-3-4-3 |
Test 512K base memory |
1-4-1-3 |
Test CPU bus-clock frequency |
1-4-2-4 |
Reinitialize the chipset |
1-4-3-1 |
Shadow system BIOS ROM |
1-4-3-2 |
Reinitialize the cache |
1-4-3-3 |
Autosize cache |
1-4-4-1 |
Configure advanced chipset registers |
1-4-4-2 |
Load alternate registers with CMOS values |
2-1-1-1 |
Set Initial CPU speed |
2-1-1-3 |
Initialize interrupt vectors |
2-1-2-1 |
Initialize BIOS interrupts |
2-1-2-3 |
Check ROM copyright notice. |
2-1-2-4 |
Initialize manager for PCI Options ROMs |
2-1-3-1 |
Check video configuration against CMOS |
2-1-3-2 |
Initialize PCI bus and devices |
2-1-3-3 |
Initialize all video adapters in system |
2-1-4-1 |
Shadow video BIOS ROM |
2-1-4-3 |
Display copyright notice |
2-2-1-1 |
Display CPU Type and speed |
2-2-1-3 |
Test keyboard |
2-2-2-1 |
Set key click if enabled |
2-2-2-3 |
56 Enable keyboard |
2-2-3-1 |
Test for unexpected interrupts |
2-2-3-3 |
Display prompt Press F2 to enter SETUP |
2-2-4-1 |
Test RAM between 512 and 640k |
2-3-1-1 |
Test expanded memory |
2-3-1-3 |
Test extended memory address lines |
2-3-2-1 |
Jump to UserPatch1 |
2-3-2-3 |
Configure advanced cache registers |
2-3-3-1 |
Enable external and CPU caches |
2-3-3-3 |
Display external cache size |
2-3-4-1 |
Display shadow message |
2-3-4-3 |
Display non-disposable segments |
2-4-1-1 |
Display error messages |
2-4-1-3 |
Check for configuration errors |
2-4-2-1 |
Test real-time clock |
2-4-2-3 |
Check for keyboard error |
2-4-4-1 |
Set up hardware interrupts vectors |
2-4-4-3 |
Test coprocessor if present |
3-1-1-1 |
Disable onboard I/O ports |
3-1-1-3 |
Detect and install external RS232 ports |
3-1-2-1 |
Detect and install external parallel ports |
3-1-2-3 |
Re-initialize onboard I/O ports |
3-1-3-1 |
Initialize BIOS Data Area |
3-1-3-3 |
Initialize Extended BIOS Data Area |
3-1-4-1 |
Initialize floppy controller |
3-2-1-1 |
Initialize hard disk controller |
3-2-1-2 |
Initialize local bus hard disk controller |
3-2-1-3 |
Jump to UserPatch2 |
3-2-2-1 |
Disable A20 address line |
3-2-2-3 |
Clear huge ES segment register |
3-2-3-1 |
Search for option ROMs |
3-2-3-3 |
Shadow option ROMs |
3-2-4-1 |
Set up Power Management |
3-2-4-3 |
Enable hardware interrupts |
3-3-1-1 |
Set time of day |
3-3-1-3 |
Check key lock |
3-3-3-1 |
Erase F2 prompt |
3-3-3-3 |
Scan for F2 key stroke |
3-3-4-1 |
Enter SETUP |
3-3-4-3 |
Clear in POST flag |
3-4-1-1 |
Check for error |
3-4-1-3 |
POST done - prepare to boot operating system |
3-4-2-1 |
One beep |
3-4-2-3 |
Check password (optional) |
3-4-3-1 |
Clear global descriptor table |
3-4-4-1 |
Clear parity checkers |
3-4-4-3 |
Clear screen (optional) |
3-4-4-4 |
Check virus and backup reminders |
4-1-1-1 |
Try to boot with INT 19 |
4-2-1-1 |
Interrupt handler error |
4-2-1-3 |
Unknown interrupt error |
4-2-2-1 |
Pending interrupt error |
4-2-2-3 |
Initialize option ROM error |
4-2-3-1 |
Shutdown error |
4-2-3-3 |
Extended Block Move |
4-2-4-1 |
Shutdown 10 error |
4-3-1-3 |
Initialize the chipset |
4-3-1-4 |
Initialize refresh counter |
4-3-2-1 |
Check for Forced Flash |
4-3-2-2 |
Check HW status of ROM |
4-3-2-3 |
BIOS ROM is OK |
4-3-2-4 |
Do a complete RAM test |
4-3-3-1 |
Do OEM initialization |
4-3-3-2 |
Initialize interrupt controller |
4-3-3-3 |
Read in bootstrap code |
4-3-3-4 |
Initialize all vectors |
4-3-4-1 |
Boot the Flash program |
4-3-4-2 |
Initialize the boot device |
4-3-4-3 |
Boot code was read OK |