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Help with COM ports

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Daniel Williams

Thread Starter
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
 

sos

Junior Member
Joined
Jan 15, 2002
Professional Status
Certified General Appraiser
State
Florida
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
 

Daniel Williams

Thread Starter
Senior Member
Joined
Jan 14, 2002
Professional Status
Appraiser Trainee
State
Illinois
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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