Jp4: Clear Cmos Contents; Jp5, Jp6, Jp7: Rs232/422/485 (Com2) Selection; Jp8: Com1 Rs232 +5V / +12V Power Setting - Intel MAT-880 User Manual

JP4: Clear CMOS Contents

Use JP4 to clear the CMOS contents. Note that the ATX-power
connector should be disconnected from the board before clearing
CMOS.
JP4

JP5, JP6, JP7: RS232/422/485 (COM2) Selection

COM1, COM3, and COM4 are fixed for RS-232 use only.
COM2 is selectable for RS232, RS-422 and RS-485.
The following table describes the jumper settings for COM2 selection.
Function
(pin closed)

JP8: COM1 RS232 +5V / +12V Power Setting

Pin #
Signal Name
1
3
5
COM1 Settings: Pin 1-2 short = +12V, Pin 5-6 short = +5V,
Pin 3-4 short = standard COM port
Setting
Pin 1-2
Short/Closed
Pin 2-3
Short/Closed
COM2
RS-232
JP7:
1-2
Jumper
Setting JP5:
3-5 & 4-6
JP6:
3-5 & 4-6
RI
RI (default)
RI
MAT-880 User' s Manual
INSTALLATIONS
Function
Clear CMOS
RS-422
JP7:
3-4
JP5:
1-3 & 2-4
JP6:
1-3 & 2-4
JP8 Signal Name
+12V
RI (default)
+5V
Normal
RS-485
JP7:
5-6
JP5:
1-3 & 2-4
JP6:
1-3 & 2-4
Pin #
2
4
6
11