Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!ncar!noao!amethyst!organpipe!organpipe.cs.arizona.edu!mat From: mat@zeus.opt-sci.arizona.edu (Mat Watson) Newsgroups: comp.sys.ibm.pc.hardware Subject: Conflicting Cards. Help Needed. Message-ID: Date: 24 Oct 90 05:16:35 GMT Organization: University of Arizona Optical Sciences Center Lines: 25 I just had my old 8086 system upgraded to a baby 80286 system at a local computer store. Unfortunately there's a strange problem concerning my modem and serial I/O cards that neither the vendor or I can figure out. With either the modem or the serial I/O card installed by itself each of the cards works fine. Howerver, if both are installed at the same time neither of them works correctly. This included the system failing to recognize one of the cards altogether even after we had checked to make *sure* that each of the cards had a unique COM/IRQ number pair compatible with the software on my system. Finally we found an I/O card that along with my modem allowed the system to recognize both with the correct IRQ/COM numbers. Still the cards failed to operate correctly. What could possibly be wrong? Configuration: System Board - 286LX-A , VLSI chip set, no manufacturer name in manual. I/O Board - PE-508, 2 serial, 1 parallel, and 1 game port, again no manufacturer name in manual. COM1 IRQ4 Modem Board - 2400B/2 by Prometheus. COM2 IRQ3 Any help will be appreciated. --Mat mat@zeus.opt-sci.arizona.edu