Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!iuvax!ndcheg!ndmath!nstar!root From: root@nstar.UUCP (Larry Snyder) Newsgroups: comp.sys.ibm.pc Subject: Re: serial port problems... HELP! Summary: multiple COM ports on a PC Message-ID: <75@nstar.UUCP> Date: 16 Aug 89 16:53:35 GMT References: <30004@beta.lanl.gov> Distribution: na Organization: The Northern Star, Notre Dame, IN Lines: 13 In article <30004@beta.lanl.gov>, pt@beta.lanl.gov (Paul A. Thiessen) writes: > Hello. Does anyone know how to successfully use 3 COM ports on a PC? I have > a modem on COM1 (or 2), and a card with two serial ports. I have been unable to This depends on your software but generally speaking comm port 1 and 3 share IRQ 4 while comms 2 and 4 share IRQ 3. Qmodem for example has an installation where you can select the both the address and interrupt being used for communications. -- Larry Snyder uucp: iuxax!ndcheg!ndmath!nstar!larry The Northern STAR XBBS/Usenet Site 219-287-9020 (VHST) - 219-289-3745 (PEP+)