Filter
Top Products
POST Error Codes, Messages and FRU to Failure Information 99
Table 17. POST Code - Port 80h Codes
Diagnostic LED Decoder
Post
Code
Note: G=Green, R=Red,
A=Amber
Description
MSB LSB
07h Off G G G Uncompress various BIOS modules.
08h G Off Off Off Verify password checksum.
08h G Off Off Off Verify CMOS checksum.
07h Off G G G Read microcode updates from BIOS ROM.
07h Off G G G
Initializing the processors. Set up processor registers. Select least
featured processor as the BSP.
0Bh G Off G G Hook before the keyboard BAT command is issued.
0Ch G G Off Off
Keyboard Controller Test: the keyboard controller input buffer is free.
Next, issuing the BAT command to the keyboard controller.
0Eh G G G Off
Init after keyboard test: the keyboard controller BAT command result
has been verified. Next, performing any necessary initialization after
the keyboard controller BAT command test.
0Fh G G G G
Write Command Byte 8042: the initialization after the keyboard
controller BAT command test is done. The keyboard command byte
will be written next.
10h Off Off Off R
Keyboard Init: the keyboard controller command byte is written.
Next, issuing the pin 23 and 24 blocking and unblocking commands.
10h Off Off Off R Disable and initialize 8259.
11h Off Off Off A Detect configuration mode, such as CMOS clear.
13h Off Off G A Chipset initialization before CMOS initialization.
19h G Off Off A
Init System Timer: the 8254 timer test is over. Starting the memory
refresh test next.
1Ah G Off G R
Check Refresh Toggle: the memory refresh line is toggling.
Checking the 15 second on/off time next.
23h Off Off A G
Setup Interrupt Vectors: reading the 8042 input port and disabling
the MEGAKEY Green PC feature next. Making the BIOS code
segment writable and performing any necessary configuration before
initializing the interrupt vectors.
24h Off G R Off
Before Vector: configuration is required before interrupt vector
initialization has completed. Interrupt vector initialization is about to
begin.
25h Off G R G Init interrupt Vectors: interrupt vector initialization is done.
F2h R R A R Initialize SMM handler. Initialize USB emulation.
F5h R A R A Validate NVRAM areas. Restore from backup if corrupted.
12h Off Off G R
Load defaults in CMOS RAM if bad checksum or CMOS clear jumper
is detected.
12h Off Off G R Initializing APP CMOS RAM for appliance servers only.
12h Off Off G R Check point after CMOS initialized.
27h Off G A G Validate date and time in RTC.
continued