This KDB only applies to customers who are developing there own serial driver
for the Dflex. Any standard serial driver will do this already.
The following describes how to enable the generation of
interrupts on a typical dumb serial board (including
our Dflex products).

Typically a 16450 or 16550 type UART will power up with
it's ability to generate interrupts disabled. To enable
a port's interrupts at the chip level the OUT2 pin must
be raised.

The suggested 8086 assembly language to do this is as
follows:

mov dx,UARTbase+4
in al,dx
or al,08h
out dx,al

For more information on the use of interrupts and UARTS
consult the:
National Semiconductor - Data Communications Local Area Networks
UARTs Handbook



--
Allan Smith Phone#: (519)836-1291
Connect Tech Inc. Fax#: (519)836-4878
Guelph, Ontario, Canada Email: aes@connecttech.COM