USB 2.0 Connector
Pin 1
Secondary
Master (3rd)
Secondary
Slave (4th)
Primary Slave
(2nd)
Primary
Master (1st)
Pin 1
8. Support Six USB 2.0 Connectors
This motherboard provides six
2.0 ports to connect USB devices such as mouse,
keyboard, modem, printer, etc. There are four forts on the PC99 back panel. You can use
proper cables to connect USB devices from PC99 back panel or connect USB 2.0 header to
the front panel of chassis.
6. Connecting IDE and Floppy Cables
Connect 34-pin floppy cable and 40-pin, 80-wire IDE cable to floppy connector FDC and IDE
connector. Be careful of the pin 1 orientation. Wrong orientation may cause system damage.
9. Front Audio Connector
If the housing has been designed with an audio port on the front panel, you’ll be able to
connect onboard audio to front panel through this connector. By the way, please remove
the jumper cap from the Front Audio Connector before you connect the cable. Do not
remove these yellow jumpers cap if your housing doesn’t have an audio port on the front
panel.
Pin1
Pin 1
ATA 66/100/133
IDE Connector
FDC Connector
IDE 2 (Secondary)
IDE 1 (Primary)
7. 10/100 Mbps LAN onboard
The South Bridge SiS962L includes a fast Ethernet controller on chip. On the strength of
RealTek 8201BL PHY on board, which is a highly-integrated Platform LAN Connect
device, it provides 10/100M bps Ethernet for office and home use, the Ethernet RJ45
connector is located on top of USB connectors. The orange LED indicates the link mode, it
lights when linking to network. The green LED indicates the transfer mode, and it lights
when data is transferring. To enable or disable this function, you may simply adjust it
through BIOS.
Orange/Link
Green/Transfer
+5V
SBD2-
SBD2+
GND
KEY
1
+5V
SBD3-
SBD3+
GND
NC
1
AUD_MIC
AUD_MIC_BIAS
AUD_FPOUT_R
NC
AUD_FPOUT_L
AUD_GND
AUD_VCC
AUD_RET_R
KEY
AUD_RET_L
Front Audio Connector
