Jumpers And Connectors; Cpu Clock Ratio Select (J1,J2); On-Board Vga Enable/Disable (J8); Internal Buzzer Control (J11) - Aaeon SBC-590 User Manual

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 allows 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
J1, J2
J3, J4
J5, J6, J7
J8
J9
J10
J11
J12
J13
J14
CN1
CN2
CN3
CN4
CN5
CN6
CN7
CN8
CN9
CN10
CN11, CN13
CN12
CN14
CN15
CN16
CN17
CN18
CN19
CN20
10 SBC-590 User's Manual
Function
CPU clock ratio
CPU working voltage setting
CPU, PCI clock setting
On-board VGA enable/disable
Clear CMOS control
PS/2 mouse/IRQ12 control
Internal buzzer control
Watchdog timer control
COM2 IRQ control
COM1 IRQ control
IrDA Tx/Rx header
Keylock connector
Speaker connector
CPU fan power connector
HDD LED connector
RESET connector
Primary IDE
Secondary IDE
Floppy drive
Feature connector
PC/104 connector
COM2
Printer Port
Power connector (-5V, -12V, Gnd)
VGA connector
Keyboard connector
COM1
Power connector (+5V, +12V, Gnd)
Keyboard and PS/2 mouse connector