Intel LB440GX/L440GX - BIOS Central

Intel L440GX/LB440GX BIOS Post Codes:

Standard BIOS Port 80 Codes in Execution Sequence During POST

02	Verify real mode
12	Restore processor control word during warm boot (only occurs on warm boot)
24	Set ES segment register to 4GB
04	Get processor type
06	Initialize system hardware
18	8254 timer initialization
08	Initialize PCIset registers with initial POST values
C4	Initialize system flags in CMOS
11	Load alternate registers with initial POST values
0E	Initialize I/O
0C	Initialize caches to initial POST values
16	BIOS ROM checksum
17	Turn cache off
28	Autosize DRAM
2A	Clear 512KB base RAM
2C	RAM failure on address line xxxx
2E	RAM failure on data bits xxxx of low byte of memory bus (1st 4Meg)
2F	Initialize L2 cache if enabled in CMOS
38	Shadow system BIOS ROM
20	Test DRAM refresh
29	Post Memory Manager initialization (PMM)
33	Post Dispatch Manager initialization
34	Test CMOS
C1	Post error manager initialization
09	Set IN POST flag
0A	Initialize processor registers and processor microcode
3A	Autosize cache
0B	Enable processor cache
0F	Initialize the local bus IDE (not used anymore but here for Phoenix standard)
10	Initialize Power Management (APM not used in L440GX+)
14	Initialize keyboard controller
1A	8237 DMA controller initialization
1C	Reset programmable interrupt controller (PIC)
22	Test 8742 keyboard controller
32	Read processor bus-clock frequency and compute boot processor speed
67	Initialize and register via SMM through APIC bus
69	Initialize SMI handler for all processors
00	Wait for secondary processor to execute init SMI handler
F4	Exit SMI handler (secondary processor executed halt in SMI)
3C	Configure advanced PCIset registers and reset coprocessor
3D	Load alternate registers with CMOS values
42	Initialize interrupt vectors
46	Check ROM copyright notice
45	Initialize all pre-PnP devices
49	Initialize PCI bus and devices (also read ESCD and allocate resources)
48	Check video configuration against CMOS (VGA or MDA)
4A	Initialize all video adapters in system
4C	Shadow video BIOS ROM
24	Put processor in big real mode (flat mode memory addressing - up to 4GB)
59	Post display manager initialization (video screen error codes now visible)
22	Reset and test keyboard first try (only warm reset)
52	Reset and test keyboard controller (both warm and cold reset)
54	Set key click if enabled
76	Enable keyboard
58	Test for unexpected interrupts
4B	QuietBoot start (not used in L440GX+)
4E	Display copyright notice
50	Display processor(s) type and speed
51	EISA init (not used in L440GX+)
5A	Display prompt "Press F2 to enter SETUP"
5B	Disable processor L1 cache for memory test
5C	Test RAM between 512KB and 640KB
60	Test extended memory (4MB to top of memory)
62	Test extended memory address lines
64	Jump to UserPatch1
66	Configure advanced cache registers
68	Enable external and processor caches
6A	Display external cache size
6C	Display shadow message
6E	Display non-disposable segments
70	Display error messages to video
72	Check for configuration errors
74	Test real time clock
7C	Setup hardware interrupt vectors
7E	Test coprocessor if present
80	Not used
88	Initialize BIOS Data Area, time-outs for detecting parallel, serial and HDD controller. Clear CMOS shutdown flag
8A	Initialize Extended BIOS Data Area
81	Late POST core initialization of devices
87	Configure MCD devices
85	Initialize and detect PC compatible PnP ISA devices (parallel, serial, etc..)
82	Not used
84	Clear interrupts from COM port detection
86	Console redirection initialized
83	Configure onboard hard disk controller
89	Enable NMI
8C	Initialize floppy controller
90	Initialize and detect hard disks
8B	Detect and test for mouse and auxiliary device on keyboard controller
95	Install CD-ROM for boot
92	Jump to UserPatch2
C5	Initialize GPNV areas in DMI
98	Search for option ROMs. One long, two short beeps on checksum failure of an option ROM
93	Scan for User Flash ROMs. MP Table initialization (wake up secondary processor and halt it)
9C	Setup Power Management (not used)
9D	Enable security
9E	Enable hardware interrupts
A0	Set time of day
A2	Check key lock
A4	Initialize typematic rate
C2	Initialize DMI tables
C3	Log post errors with POST error manager and to SEL in BMC. Update VID bits and memory presence to BMC. Display and FRB errors (watchdog time-outs, bits or processor failures)
A8	Erase F2 prompt
AA	Scan for F2 keystroke
AC	Initialize EMP port if selected. Remove COM2 from BDA if EMP is enabled. Enter SETUP
AE	Clear IN POST flag
B0	Turn on secure boot if enabled (secure front panel, blank video, floppy write protect). Check for errors
B2	POST done - prepare to boot Operating System
B4	One short beep before boot
B5	Display QuietBoot (not used)
BE	Clear screen
B6	Check password (optional)
BC	Clear parity checkers
BA	Not used
B7	ACPI configuration (table configuration in memory and BDA)
BD	Display MultiBoot menu if ESC is hit
BF	Display system config summary (if enabled in CMOS)
8F	Get total # of hard drives and put in BDA
91	Program IDE hard drives (timing, PIO modes, etc...)
9F	Save total # of hard drives (SCSI and ATA) in BDA
97	Fixup MP table (checksum)
99	Check SMART hard drive
C7	Prepare to boot to OS. Clean up graphics and PMM areas
C0	Try to boot with Int19h. Return to video mode 3, disable PMM, return to real mode, disable gate A20, clears system memory, resets stack, invokes Int19h
D0	Interrupt handler error
D2	Unknown interrupt error
D4	Pending interrupt error
D6	Initialize option ROM error
D8	Shutdown error
DA	Extended Block Move
DC	Shutdown 10 error