Com2 Connector; Connecting Front Panel Cable - AOpen MK79 Installation Manual

6. COM2 Connector

This motherboard provides two serial ports. One of them is on back panel connector, and
the other is on the upper middle of board. With proper cable, you can connect it to the back
panel of chassis.
Pin 1
1 2
DOD#
SIN
SOUT
DTR#
GND
CTS#
RI#
DSR#
RTS#
KEY
COM2 Connector
nd
7. Support 2
This motherboard provides six USB connectors to connect USB devices, such as mouse,
keyboard, modem, printer, etc. There are four connectors on the PC99 back panel. You
can use proper cable to connect the other USB connector to the back panel or front panel
of chassis.
Pin 1
USB2 Connector
Pin 1
SBD3+
SBD3-
GND
+5V
2
NC
KEY
1
+5V
GND
USB3 Connector
SBD2-
SBD2+
rd
and 3 USB Ports (1.1)
8. Connecting IDE, Floppy Cables
Connect 34-pin floppy cable and 40-pin IDE cable to floppy connector FDC connector. Be
careful of the pin1 orientation. Wrong orientation may cause system damage.

9. Connecting Front Panel Cable

Attach the power LED, speaker, and reset switch connectors
to the corresponding pins. If you enable "Suspend Mode"
item in BIOS Setup, the ACPI & Power LED will keep
flashing while the system is in suspend mode.
Locate the power switch cable from your ATX housing. It is
2-pin female connector from the housing front panel. Plug
this connector to the soft-power switch connector marked
SPWR.
Secondary Secondary
Slave (4th) Master (3rd)
Pin 1
Primary
Primary
Slave (2nd)
Master (1st)
Pin 1
FDD Connector
1
IDE LED
Speaker
1
NC SPWR
NC
GND
+5V
ACPI LED-
IDE LED
GND
IDE LED
ACPILED
+5V NC
+5V ACPI_B
GND GND
NC RESET
SPEAKER
GND
IDE 2 Secondary
IDE 1 Primary
ATA 33/66/100
IDE Connector
SPWR
ACPI & PWR
LED
ACPI LED
(Blue)
Reset