Instruction manual

10 SBC-400 User's Manual
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 table below lists the function of each of the board jumpers and
connectors.
Jumpers and connectors
Label Function
JP1 Cache memory select
JP2,3,4 CPU type select
JP5,6 CPU Vcc select
JP7,8 CPU clock select
JP9 Serial port IRQ select
JP10 Parallel port DRQ select
JP11 Parallel port DACK select
JP12 Power LED and keylock
JP13 External speaker
JP14 Reset switch
JP15 Turbo LED
JP17 Turbo switch
JP23,39 RS-232/422/485 select
JP38 Watchdog timer time-out signal select
CN1 Enhanced IDE connector
CN2 FDD connector
CN3 Parallel connector
CN4 Power connector
CN5,6 PC/104 module connectors
CN7 External keyboard connector
J1 Keyboard and/or PS/2 mouse connector
COMA Serial port 1
COMB Serial port 2