User`s manual

ECM-5716 Series
ECM-5716 Series User’s Manual 111
POST Codes
POST (hex) Description
CFh Test CMOS R/W functionality.
C0h Early chipset initialization:
-Disable shadow RAM
-Disable L2 cache (socket 7 or below)
-Program basic chipset registers
C1h Detect memory
-Auto-detection of DRAM size, type and ECC.
-Auto-detection of L2 cache (socket 7 or below)
C3h Expand compressed BIOS code to DRAM
C5h Call chipset hook to copy BIOS back to E000 & F000 shadow
RAM.
0h1 Expand the Xgroup codes locating in physical address
1000:0
02h Reserved
03h Initial Superio_Early_Init switch.
04h Reserved
05h 1. Blank out screen
2. Clear CMOS error flag
06h Reserved
07h 1. Clear 8042 interface
2. Initialize 8042 self-test
08h 1. Test special keyboard controller for Winbond 977 series
Super I/O chips.
2. Enable keyboard interface.
09h Reserved
0Ah 1. Disable PS/2 mouse interface (optional).
2. Auto detect ports for keyboard & mouse followed by a port
& interface swap (optional).
3. Reset keyboard for Winbond 977 series Super I/O chips.
0Bh Reserved
0Ch Reserved
0Dh Reserved
0Eh Test F000h segment shadow to see whether it is R/W-
able or
not. If test fails, keep beeping the speaker.
0Fh Reserved
10h Auto detect flash type to load appropriate flash R/W codes
into the run time area in F000 for ESCD & DMI support.
11h Reserved
12h Use walking 1’s algorithm to check out interface in CMOS
circuitry. Also set real-time clock power status, and then
check for override.
13h Reserved
14h Program chipset default values into chipset. Chipset default
values are MODBINable by OEM customers.
15h Reserved