Acrosser AR-B1740 - Manual (Page 30)

Frequency/Voltage Control
This section describes Frequency and Voltage control for the system.
Auto Detect DIMM/PCI CLK
When enabled, this item will auto detect if the DIMM and PCI socket have devices and will
send clock signal to DIMM and PCI devices. When disabled, it will send the clock signal to all
DIMM and PCI socket.
Spread Spectrum
This item allows you to enable/disable the spread spectrum modulate.
POST Codes
The following codes are not displayed on the screen. They can only be viewed on the LED
display of a so called POST card. The codes are listened in the same order as the according
functions are executed at PC startup. If you have access to a POST Card reader, you can
watch the system perform each test by the value that's displayed. If the system hangs (if
there's a problem) the last value displayed will give you a good idea where and what went
wrong, or what's bad on the system board.
CODE DESCRIPTION OF CHECK
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
AR-B1740 User's Manual 3 0