Changing The Cpu Type - AOpen AP43 User Manual

Changing the CPU Type

You must set jumpers JP6 to JP10, JP12*, JP13 to JP20 and JP29
according to the CPU type. The board supports both 5V and 3.45V
CPUs. Make sure that you know your CPU type and its operating
voltage before you begin. Improper setting of jumpers may result in
system failure.
5V CPU Type
For Intel processors, you must determine if your CPU is SL-enhanced
or not. To check, simply look for the "&" symbol in the third row on the
lower label of the CPU.
The P24D processor looks very similar to an Intel SL-enhanced CPU
except for the letter "W" in the third row on the lower label of the CPU.
The letter "W" indicates that the CPU supports the write-back mode.
The following figure shows how to determine an Intel SL-enhanced
CPU and a P24D CPU.
SL-ENHANCED
INDICATOR
*
Set JP12 only if the CPU in use is a 3.45V CPU. Otherwise, the jumper remains
open.
User's Guide
Hardware Setup
WRITE-BACK MODE
INDICATOR
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