>
> I have 4 com ports installed with Slackware 3.2, kernel 2.0.35.
>
> Before I made AX.25 work with my kiss TNC's, my mouse (run of the
> mill serial mouse) worked OK. Now it does not. Clearly, IRQ4 seems to
> be taken by kissattach on COM3 (ttyS2, excuse me) and I have to solve
> that dilema.
>
> For a time I was using a modified MS-400 card (4 serial ports)
> modified 'a la AA4RE' for use with BPQ 4.08A, and a single shared
> hardware interrupt for COM3 to COM6 using a 4 input CMOS OR gate
> with a line from each UART chip to a single IRQ line out of the OR
> gate. It worked fine. OS was MSDOS 6.22, and Desqview 2.60 as
> multitasker.
>
> I wonder if that COULD work under Linux, or if somebody uses it under
> Linux. I could attach the TNC's to a single IRQ and leave COM 1 for
> mouse and COM 2 for CAT.
>
It is fairly easy to modify a serial card to use an unused IRQ. It
normally only required cutting the trace to the IRQ4 or IRQ3 connection
and running a wire to the connection of one of the unused IRQs. If you
have a AT-style connector, you get access to a few additional IRQs. It's
usually safe to use IRQs 5 (unless you use a second parallel port), 9, 10,
11 and 15.
Bob
----
Bob Nielsen Internet: tnyew.vpzgpu@mwt.net
Tucson, AZ AMPRnet: wsewhi@cistron.nl
DM42nh http://www.primenet.com/~nielsen