Jp34: L1 Write-Back /Write-Through Cache Select; Jp46: Vrm (Voltage Regulator Module) Socket (Optional); Jps2: Ps/2Mouse Function Jumper - SOYO Pentium SiS 551x User's Manual & Technical Reference

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JP34: 11 Write-Back /Write-Through Cache Select
Set JP34 to configure the mainboard for L1 Write-Back/Write-Through Cache.
Write Through Cache

JP46: VRM (Voltage Regulator Module) Socket (Optional)

VRM socket is dedicated for 2.5V CPU to use. It converts 3.3V to 2.5V for the
advance high speed P54CX.
JPS2: PS/2 Mouse Function Jumper
Set PS/2 mouse function enabled or disabled.
PS/2 Mouse Function
Note: The IRQ12 is dedicated to PS/2 mouse when choose enabled of PS/2 Mouse
Function.
11 Cache
Write Back Cache
(default)
Disabled
(default)
Enabled
Hardware Setup
JP34
1 2 3
1 2 3
JPS2
1 2
1 2