![background image](http://html1.mh-extra.com/html/ics/wincomm4/wincomm4_product-manual_3531735013.webp)
Manual Number: 00750-004-14
Page 3-3
should only have one port set to "M". This example shows all four ports sharing a single IRQ.
E5:
M
M
S
S
N
N
Set the jumpers to "S" if you are using more than one WINCOMM4 in a BUS or you wish to
completely remove the pull-down resistor for hardware compatibility. Setting the board in this
configuration when it is not accompanied by a pull-down or pull-up resistor will prevent the
ports from triggering an interrupt. The factory default for this is COM1 & 3, sharing IRQ4 and
COM2 & 4, sharing IRQ3.