> Hi,
>
> I have a need to operate 3 comm ports on my pc, so bought a
> standard card that has FDD, HDD, game, LPT and 2 COMs. I disabled
> the FDD, HDD and game ports and configured the com ports to
> 3 and 4 using jumpers on the board.
>
> Having installed the card, Win95 detected the new ports. All well
> and good, but in use, com3 stops com1 working and com4 stops com2.
>
> It must (surely) be possible to configure the system so that I can
> use at least three of the ports at the same time.
>
> Anyone help me out on this?
>
>
> Thanks and regards,
>
>
> Mike Watson
>

Hi there

A PC's COMM ports 1 & 3 use interrupt 4 and 2 & 4 use interrupt 3, as
a result, they interfere with eachother. I haven't tried this but
perhaps you could hard wire any other two (open) interrupts on your
new i/o. ie physically cut the IRQ 3 & 4 connectors on the card and
solder them to the other two new (open) edge connectors. I've don
this for other cards before (not comm). You'll need the pin-out's for
the ISA slot for that, unfortunately I don't have one with me now.

If this isn't too clear, e-mail me privately and I'll explain with
more detail.

Regards



Jacques Vrey
Iscor Steel Profile Products
Internal Post Point 74
PO Box 2
Newcastle
2940
South Africa
Tel: +27 (0)3431 48759
Fax: +27 (0)3431 48001
jvrey@it.new.iscorltd.co.za
The views expressed above are not necessarily those of Iscor Limited.