Can not connect old device to COM1 under Windows 2000

I am trying to communicate with an old (late 80s maybe?) device
over COM1.  I have used terminal programs and port monitors to test, but
alas there seems to be -no- data going back and forth over the COM

Device is good (tested under DOS on another system) and cable
is good (tested).  Are there Windows 2000 settings or something
I need to change in order for it to be able to communicate
with this simple device over COM1?

Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Do you have Win2000 drivers for this device? If not chances are you won't be able to use it.

What device is it?
Althoug this links isn't quite in line with what you have posted it still may hold some information that may be useful.

Troubleshooting MS-DOS-Based Programs in Windows;en-us;165214
-Try a different cable if not may need a null modem cable or it may need a straight through cable.  It might need a special cable with different pin outs as well.
-I don't know if your port monitors tell you what speed you serial port needs to be set at as well?  Make sure the speeds/parity and such is correct.
-Obviously simple but make sure that your com port is enabled on the computer your trying to use
Ultimate Tool Kit for Technology Solution Provider

Broken down into practical pointers and step-by-step instructions, the IT Service Excellence Tool Kit delivers expert advice for technology solution providers. Get your free copy now.

If this device can be accessed through a terminal emulator, it should'n matter which O/S as long as the required terminal settings can be used. Have you checked the COM1 hardware? Is the port properly installed in win2000? Is it enabled in BIOS?

Some terminal programs are pretty unimaginative and may require "standard" port settings for the COM port (I/O address and a dedicated IRQ), while win2k likes to hide the hardware under the HAL.

schlagAuthor Commented:
I think ticktacksir is on the right path with recommending a null modem cable.  Think I was using that on the DOS machine.  Will double-check later on when I get home.
If the "device" works OK on a DOS box, but not on the w2k box, using the same cable (which is obviously good), it may not be the cable that gives trouble...


You also need to have correct speed set on the com port.
This needs to be done in your terminal program.
Which speed device supports should be found in it's manual, if you have no manual try to get one, since gussing is almost impossible.

/Hans - Erik Skyttberg
use hyperterminal to connect to the device using the required speed, parity and stop bit settings...
then you should be able to communicate with the device...

it would also depend upon your software coz, windows 2k will not allow the comp port access directly...
A pity there wasn't much useful feedback, as the Q was interesting. I think there are useful tidbits in all the comments.

No comment has been added lately, so it's time to clean up this TA.
I will leave a recommendation in the Cleanup topic area that this question is:
PAQ/No Refund

Please leave any comments here within the next seven days.
EE Cleanup Volunteer
PAQed - no points refunded (of 335)

Community Support Cleanup Moderator

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.