10 PCM-5896 User ManualJumpers and connectorsConnectors on the board link it to external devices such as harddisk drives, a keyboard, or floppy drives. In addition, the boardhas a number of jumpers that allow you to configure your systemto suit your application.The following tables list the function of each of the board's jumpersand connectors.JumpersLabel FunctionJ2 Clear CMOSJ3 DOC address selectJ4 ATX soft-power switch connectorJ5 COM4 RI pin voltage selectJ6 COM2 RS-232/422/485 selectJ7 LCD clock selectJ8 LCD driving voltage selectJ9 Reserve for future use (default : 1-2 close)J10 COM3 RI pin voltage selectJ11 COM2 RS-232/422/485 selectJ12 Audio output selectS1 (2~6) CPU Vcore selectS3 (1~3) CPU clock selectS3 (4~6) CPU frequency ratio
