allred@ut-emx.UUCP (Kevin L. Allred) (06/02/90)
I went to install an old internal modem into my system, and I came up against the com3 and com4 question. The modem could only be configured as com1 or com2. Before I tried, I thought I would just set up my 2 existing serial ports to be com2 and com3. Between the manual (which only sould configuration for com1 and com2 with interrupts 3 and 4) and my experimenting, I couldn't figure out how to do it. Does it require a special i/o card to configure com3 and com4? How do the four com ports share interupts, names, and addresses? I never could get the modem to work (it was manufactured in 1983 -- back when the xt bus was the norm), so for the moment the question is accademic, but in the future I will probably want to add another port or two. -- Kevin Allred allred@emx.cc.utexas.edu allred@ut-emx.UUCP