Once apon a time Chick Martin said, 'MODEM PROBLEMS' to Vicki Crawford...

 CM> Thanx Vicki - I will try your suggestion although I suspect the
 CM> problem  goes a little deeper.  I have found that Portinfo V1.0
 CM> indicates that the  internal card is assigned to Comm 4 OK but gives
 CM> its address as 2E8 which  is the address normally allocated by DOS to
 CM> Comm 3.
 
At risk of labouring the point, (I dont know if you got my previous
message) *COM 4 IS 2E8*!!! 3E8 is the address of COM 3!

 CM> This, it appears  creates an IRQ conflict with Comm 1 which is
 CM> allocated to my mouse driver.   Nothing I have tried seems to resolve
 CM> this problem.  Assigning the address  3E8 to Comm 4 with Dos_Com V1.0
 CM> seems to work OK but then Portinfo still  "sees" Comm 4
at address 2E8
 CM> and again reports an inability to generate  interrupts. Is it likely
 CM> that this is causing, or perhaps compounding the problem? - regards Chi

Sounds like the IRQ is set wrong, it should normally be IRQ3 for COM 4.

Regards,
Simon

... I lost a button hole today.
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