Biostar A55MH User Manual

Motherboard Manual
16
JCMOS1: Clear CMOS Header
Placing the jumper on pin2-3, it allows user to restore the BIOS safe setting and
the CMOS data. Please carefully follow the procedures to avoid damaging the
motherboard.
1
3
1
3
Pin 1-2 Close:
Normal Operation (default).
1
3
Pin 2-3 Close:
Clear CMOS data.
※ Clear CMOS Procedures:
1. Remove AC power line.
2. Set the jumper to “Pin 2-3 close”.
3. Wait for five seconds.
4. Set the jumper to “Pin 1-2 close”.
5. Power on the AC.
6. Load Optimal Defaults and save settings in CMOS.
J_COM1: Serial Port Connector
The motherboard has a Serial Port Connector for connecting RS-232 Port.
19
210
Pin Assignment
1 Carrier detect
2 Received data
3 Transmitted data
4 Data terminal ready
5 Signal ground
6 Data set ready
7 Request to send
8 Clear to send
9 Ring indicator
10 NC

Biostar A55MH Specifications

General

Memory channels	Dual-channel
Number of memory slots	2
Supported memory types	DDR3-SDRAM
Maximum internal memory	16 GB
Supported memory clock speeds	800, 1066, 1333, 1600, 1866 MHz
Processor socket	Socket FM1
Processor manufacturer	AMD
Compatible processor series	Intel® Pentium® Dual-Core
Maximum number of SMP processors	1
Power fan connector	Yes
Number of SATA II connectors	6
Number of Parallel ATA connectors	0
USB 2.0 ports quantity	4
Component for	PC
Power source type	ATX
Motherboard chipset	AMD A55
Audio output channels	5.1 channels
Motherboard form factor	micro ATX
Compatible operating systems	Windows XP/Vista/7
Supported storage drive interfaces	SATA II
Parallel processing technology support	Not supported
PCI Express slots version	2.0
LAN controller	Realtek RTL8111E
Ethernet interface type	Gigabit Ethernet
BIOS type	-

Weight and Dimensions

Depth	200 mm
Width	244 mm