Jbat1: clear cmos contents, Jp1, jp2, jp3: rs232/422/485 (com2) selection, Jp6: processor setting – IBASE MI900 User Manual
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INSTALLATIONS
JBAT1: Clear CMOS Contents
Use JBAT1, a 3-pin header, to clear the CMOS contents. Note that the
ATX-power connector should be disconnected from the motherboard
before clearing CMOS.
JBAT1
Setting
Function
Pin 1-2
Short/Closed
Normal
Pin 2-3
Short/Closed
Clear CMOS
JP1, JP2, JP3: RS232/422/485 (COM2) Selection
COM1 is fixed for RS-232 use only.
COM2 is selectable for RS232, RS-422 and RS-485.
ID394: COM3 and COM4 are fixed for RS-232 use only. The following
table describes the jumper settings for COM2 selection.
COM2
Function
RS-232
RS-422
RS-485
Jumper
Setting
(pin closed)
JP3:
1-2
JP1:
3-5 & 4-6
JP2:
3-5 & 4-6
JP3:
3-4
JP1:
1-3 & 2-4
JP2:
1-3 & 2-4
JP3:
5-6
JP1:
1-3 & 2-4
JP2:
1-3 & 2-4
JP6: Processor Setting
JP6
Setting
Processor Used
Pin 1-2
Short/Closed
Celeron D
Pin 1-2
Open
Core 2 Duo,
Pentium D,
Pentium 4 HT
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MI900 User’s Manual