Aaeon SBC-558 Manual page 27

PC/104 Plus voltage select (J5)
J5
* default
Clear CMOS (J5)
J5
* default
18 SBC-558 User Manual
3.3V *
1 2
3 4
5 6
Protect *
1 2
3 4
5 6
5V
2
1
4
3
6
5
Clear CMOS
1 2
3 4
5 6