IBM @server xSeries 343 Product Manual page 82

Table 22. POST Codes (continued)
Diagnostic LED Decoder
Post
G=Green, R=Red, A=Amber
Code
MSB
0Fh G
10h Off
10h Off
11h Off
13h Off
19h G
1Ah G
23h Off
24h Off
25h Off
F2h R
F5h R
12h Off
12h Off
12h Off
27h Off
F4h R
F6h R
15h Off
15h Off
15h Off
26h Off
28h G
29h G
2Ah G
70
LSB Description
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.
Off Off R Keyboard Init: The keyboard controller command byte is written.
Next, issuing the pin 23 and 24 blocking and unblocking
commands.
Off Off R Disable and initialize 8259.
Off Off A Detect Configuration Mode, such as CMOS clear.
Off G A Chipset Initialization before CMOS initialization.
Off Off A Init System Timer: The 8254 timer test is over. Starting the
memory refresh test next.
Off G R Check Refresh Toggle: The memory refresh line is toggling.
Checking the 15 second on/off time next.
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.
G R Off Before Vector: Configuration is required before interrupt vector
initialization has completed. Interrupt vector initialization is about
to begin.
G R G Init interrupt Vectors: Interrupt vector initialization is done.
R A R Initialize SMM handler. Initialize USB emulation.
A R A Validate NVRAM areas. Restore from backup if corrupted.
Off G R Load defaults in CMOS RAM if bad checksum or CMOS clear
jumper is detected.
Off G R Initializing APP CMOS RAM for appliance servers only.
Off G R Check point After CMOS Initialized.
G A G Validate date and time in RTC.
A R R Load Micro Code To All CPUs.
A A R Scan SMBIOS GPNV areas.
G Off A 8254 Timer Test on Channel 2.
G Off A Enable 8042.
G Off A Keyboard Reset.
G A Off Initialize LCD, if supported.
Off R Off Set Video Mode: Initialization before setting the video mode is
complete. Configuring the monochrome mode and color mode
settings next.
Off R G Debugger Hook.
Off A Off Init PCI devices and motherboard devices. Pass control to video
BIOS. Start serial console redirection.
continued
Technical Reference