IBM PCM-6890B, All-in-One FC/Socket 370 Celeron manual Jumpers and connectors, Label, Function

Jumpers and connectors

Connectors on the board link it to external devices such as hard disk drives, a keyboard, or floppy drives. In addition, the board has a number of jumpers that allow you to configure your system to suit your application.

The following tables list the function of each of the board's jumpers and connectors.

Jumpers

Label	Function
J1	Clear CMOS
J2	System temperature thermal sensor
J3	COM4 RI pin voltage select
J4	COM3 RI pin voltage select
J5	Audio output select
J6	ATX soft-power switch connector
J7	COM2 RS-232/422/485 select
J8	LCD clock select
J9	LCD driving voltage select
J10	COM2 RS-232/422/485 select
SW1 (2~3)	DOC address select
JP1	Mic_Amp

10 PCM-6890B User Manual