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Help with COM ports

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Daniel Williams

Senior Member
Joined
Jan 14, 2002
Professional Status
Appraiser Trainee
State
Illinois
Help, I have a problem with my com ports.

I have TWO serial ports....one was disabled in CMOS. I did not need but one for a long time but at my brother gave me an old DC210 and i get tired of swithching cables. I wanted BOTH serial ports enabled.....got that done but the newly enabled port is on COM 5.....why? I have (that i know of) COM 1 as first serial port....COM 2 as modem port....and thats it.

Quick Pix (WinTotal athena) only gives me a choice of selecting COM 1-4 or AUTO. ...on AUTO it does NOT find COM 5. Anyone have a clue?

Why didn't machine asign new port as COM 3 ???.seems logical to me.

Thanks
 
Daniel:

Nothing is logical in Windows. I assume that you are using Windows 95 or 98. One of your serial (Com) ports is turned off because another device is using its interrupt (IRQ). Com 1 uses IRQ 4 and Com 2 uses IRQ 3. You only have 15 interrupts and some of them are shared. To get Com 3 to work you need Com 2 in use. Which com port is your modem using? By jumping to Com 5, it would indicate it is using Com 1. To setup an additional Com port you would need a free IRQ and do additional memory setup. This is beyond the typical computer users expertise. I once changed my modems Com port and it took almost 2 hours to set it up. I would suggest you try somthing simple. Maybe an A/B switch box. You might want to contact a computer store (Compusa) and see what they recomend.

Hope this helps.


Jay Sosna
 
Jay,

Thanks for the tip about the modem. I reassigned my modem to COM3 then Removed it in the device manager. Then I rebooted...The modem picked up on COM (with same IRQ 11......COM5 swithched (by itself) to COM2....same IRQ 3. Whole thing took about 5 minutes max.....I know i just got lucky :P :!:

By the way, your right, I'm running Win98 on a 450 PIII w/ 256meg SDRAM..slow but relativly stable!

Thanks again,
 
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