I have looked at the archives and cannot find how to set up 4 four port card with one irq for CT under DOS. What TSRs do you use, what settings for the TSRs and what port settings in CT set-up? Neil, G3RIR -- WWW: http://www.k1ea.com/ Submissions: ct-user@contesting.com Administrative requests: ct-user-REQUEST@contesting.com Problems: owner-ct-user@contesting.com