Post Error Code - Gigabyte GA-EX58-UD5 User Manual

5-4

POST Error Code

POST (hex)
CFh
C0h
C1h
C3h
C5h
01h
02h
03h
05h
07h
08h
0Ah
0Eh
10h
12h
14h
16h
18h
1Bh
1Dh
23h
GA-EX58-UD5P/UD5 Motherboard
Description
Test CMOS R/W functionality
Early chipset initialization:
- Disable shadow RAM
- Program basic chipset registers
Detect memory
- Auto-detection of DRAM size, type and ECC
Expand compressed BIOS code to DRAM
Call chipset hook to copy BIOS back to E000 & F000 shadow RAM
Expand the Xgroup codes locating in physical address 1000:0
DualBIOS init (optional)
Initial Superio_Early_Init switch
1. Blank out screen
2. Clear CMOS error flag
1. Clear 8042 interface
2. Initialize 8042 self-test
1. Test special keyboard controller for Winbond 977 series Super I/O chips
2. Enable keyboard interface
1. Disable PS/2 mouse interface (optional)
2. Auto detect ports for keyboard & mouse followed by a port &
interface swap (optional)
3. Reset keyboard Super I/O chips
Test F000h segment shadow to see whether it is R/W-able or not. If test fails,
keep beeping the speaker
Auto detect flash type to load appropriate flash R/W codes into the run time area
in F000 for ESCD & DMI support
Use walking 1's algorithm to check out interface in CMOS circuitry. Also set
real-time clock power status, and then check for override
Program chipset default values into chipset. Chipset default values are
MODBINable by OEM customers
Initial onboard clock generator if Early_Init_Onboard_Generator is defined
See also POST 26h
Detect CPU information including brand, SMI type and CPU level
Initial interrupts vector table. If no special specified, all H/W interrupts are
directed to SPURIOUS_INT_HDLR & S/W interrupts to SPURIOUS_soft_HDLR
Initial EARLY_PM_INIT switch
1. Check validity of RTC value:
e.g. a value of 5Ah is an invalid value for RTC minute
2. Load CMOS settings into BIOS stack. If CMOS checksum fails,
use default value instead
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