SOYO SY-7ISA plus Owner's Manual page 46

Hardware Installation
CNR MR Card-CODEC OPTION (JP8)
Step 4.
CNR MR Card-
CODEC OPTION
JP8 Setting
Set JP9 for FWH Boot Block Write-Protect
Step 5.
Setting this jumper to open will prevent the boot block area of the FWH
(FirmWare Hub) chip from being written data into such that it is write-
protected from unwanted or abnormal write activity.
Note: In some rare cases, the boot block area will need to be flashed to
complete the BIOS upgrade procedure. Setting JP9 to open will cause
incomplete BIOS update in that case.
The FWH Boot
Block Write-Protect
JP9 Setting
SPEAKER OPTION (JP22)
Step 6.
Through this jumper the case speaker output can be redirected to the
external (amplified) speakers (if connected) through the on-board Audio-
Codec.
SPEAKER OPTION
JP22 Setting
Primary
open JP8
1 2
Locked
Open JP9
1 2
Lineout SPK
Short pin 1-2
42
Secondary
Short JP8
Unlocked
Short JP9
CASE SPK
Short pin 2-3
1 2 3
SY-7ISA+
1 2
1 2
1 2 3