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Configuring the CPU Frequency (for A1 version only)
The MB720 A1 version supports FSB manual adjustment, but this
feature will be removed in the B1 version.
FSB
100MHz
133MHz
166MHz
200MHz
JBAT1: Clear CMOS Contents
Use JBAT1 to clear the CMOS contents. Note: Disconnect the
ATX-power connector from the board before clearing CMOS.
JBAT1
JP1: COM3 RS232 +5V / +12V Power Setting
Pin #
Signal Name
1
RI
3
RI (Default)
5
RI
COM3 Settings: Pin 1-2 short = +12V, Pin 5-6 short = +5V, Pin 3-4
Standard COM Port
JP2: COM4 RS232 +5V / +12V Power Setting
Pin #
Signal Name
1
RI
3
RI (Default)
5
RI
MB720 User's Manual
INSTALLATIONS
1
2
3
ON
ON
OF
OF
F
OF
ON
OF
OF
F
F
OF
OF
OF
OF
F
F
F
ON
OF
OF
OF
F
F
Setting
Function
Pin 1-2
Normal
Short/Closed
Pin 2-3
Clear CMOS
Short/Closed
JP1
Signal Name
+12V
RI (Default)
+5V
JP2
Signal Name
+12V
RI (Default)
+5V
4
F
F
F
F
Pin #
2
4
6
Pin #
2
4
6
9
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