Post by thread:Help on comms and IRQ's please

I have a digital multimeter and a Picstart programmer that I want to hook up to a serial comm port. My mouse is on comm 1, IRQ4 My modem is on Comm 2, IRQ3 So can I connect something to Comm 3 or 4 if they use the same IRQs as Comm 1 & 2 ????? Seems to me that they would still have hardware conflicts if they are trying to use the same interupt line unless the Comm port could be tri-stated from one another to share the interupt ??? Am I out in left field here??? So, does the "Comm" really mean anything other than that it's a communications serial port??? Any help would be greatly appreciated. Ken Dougal spam_OUTslm5gTakeThisOuTcc.usu.edu

> My mouse is on comm 1, IRQ4 > My modem is on Comm 2, IRQ3 > So can I connect something to Comm 3 or 4 if they use the same IRQs as > Comm 1 & 2 ????? As far as I'm concerned there's no way you can use the com 3 and 4 on your setup as above. You get a special PC card however that can share the IRQ that gives you the ability to have 4 Comm ports. There several brands available like from National Instruments and a cheaper version from ADVANTEC Corporation. I havent actually seen something on the net yet but I suppose it'll be there. Good luck and shout if you need some more info. Jattie van der Linde

Connect your mouse on Com2 IRQ3, and set your modem on Com3 IRQ4. Your Com1 is free now ... you can connect it to your programmer (of course you can not program your hardware while you make connection with modem) _______________________________ Lauw Lim Un Tung Pecindilan 5/14 Surabaya 60273 INDONESIA phone : 62-31-318895 e-mail : .....tungKILLspam@spam@peter.petra.ac.id _______________________________ On Thu, 27 Feb 1997, Ken Dougal wrote: {Quote hidden}> I have a digital multimeter and a Picstart programmer that I > want to hook up to a serial comm port. > > My mouse is on comm 1, IRQ4 > > My modem is on Comm 2, IRQ3 > > So can I connect something to Comm 3 or 4 if they use the same IRQs as > Comm 1 & 2 ????? > > Seems to me that they would still have hardware conflicts if they are > trying to use the same interupt line unless the Comm port could be > tri-stated from one another to share the interupt ??? Am I out in > left field here??? > > So, does the "Comm" really mean anything other than that it's a > communications serial port??? > > Any help would be greatly appreciated. > Ken Dougal > slm5gKILLspamcc.usu.edu >