Hi Jan,

> On my PC I have 4 COM ports, and I can set the IO card to what I want, but
> 95 insist that COM3 stay on IRQ4, and COM4 on IRQ5. (Useless info : When I
> stick a modem on COM4 it talks to it, but the modem response isn't seen.) If

Sharing interrupts is not well supported in hadware on standard periferals.
Usually when they 'share' the same interrupt they cannot do this at the same
time and one of the ports has to be inactive.

There might be ways of moving the IRQs to non standard values on W95
if you hack an INI file or something.  I know on NT this is possible even
thought it also suggests the default values.

Obviously this has nothing to do with PICs directly.

Cheers
--
Kalle Pihlajasaari   kalle@ip.co.za   http://www.ip.co.za/ip
Interface Products   P O Box 15775, DOORNFONTEIN, 2028, South Africa
+ 27 (11) 402-7750   Fax: 402-7751    http://www.ip.co.za/people/kalle

DonTronics, Silicon Studio and Wirz Electronics uP Product Dealer