Technical information

Serial Solutions Newcom Parameters
A serial port must be assigned an interrupt line before it
can be used. On ISA bus PC compatibles machines and EISA
bus machines only one serial port can use an interrupt line. On
PS/2 machines serial ports can share interrupts. Multiport cards
with special interrupt hardware have different rules- see the /L
command switch (also /F) for setting up those cards.
Each serial port needs its own interrupt line for trouble
free performance, if two serial ports are allocated the same IRQ
line only one can use it at any time. NewCOM allows one port
to use the IRQ line, and any others allocated that line are polled.
For DOS and Windows 3.x use, after COM1 and COM2
installed, then IRQs 5, 7, 10, 11, 12 and 15 are available.
For example
/I1,4 set COM1 to use irq line 4
/i,-1 sets all ports to no interrupt
/i2, sets COM2 to no interrupt
/I1,4 set COM1 to use irq line 4
/I3,10 set COM3 to use irq line 10
/I4,11 set COM4 to use irq line 11
/I5,12 set COM5 to use irq line 12
/I6,15 set COM6 to use irq line 15
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