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Need to use 2nd touchscreen for MS PC DOS based program

January 16, 2013 at 09:25:02
Specs: Windows 7
Trying to recognize an upgrade touchscreen and monitor on my system as the input device.
I have MS PC DOS 6.0 System. The program requires that a specific obsolete touchscreen controller "Microtouch" is found on COM 2. If found it operates normally. Problem is the screen is unreadable/unusable. I installed a new Touch screen and monitor on Serial COM 4 and it is configured and functions properly thru all tests.
Problem is it will not be recognizeed as the input device. Only COM 2 device.
I cannot change the code of the program as it is unsupported and obsolete.
Not sure how to confirm COM 2 device is OK and accept the input from COM 4 device.
Is it possible to create some batch file to allow the program to boot up reading device 1 on COM 2 is OK and then switch then emulate COM 2 input with COM 4 device?? or something.
Not sure if the program will accept mouse input either but it is doubtful.

Thanks in advance.

See More: Need to use 2nd touchscreen for MS PC DOS based program

January 17, 2013 at 03:33:48
Hi Tc,

I believe you can use the dos MODE command to swop ports.
This can be used in-flight or in autoexec.bat.

You may run up against driver problems, as dos applications each came with their own driver library.

Your specs advise windows 7, is this involved?

If there are problems with the old touch screen, suggest taking it to a electronic (not pc) repair shop. Here in the UK, many have opened with technicians from abroad who work at component level. Generally they inspect and quote for a repair, that the customer accepts or declines.

A a matter of interest, where are you located? I am in Hammersmith, West London.

Good Luck - Keep us posted.

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January 17, 2013 at 03:53:30
Hi Mike,
I am referencing ms PC dos 6.22
The monitor is gone black. Microtouch Touchscreen 95 vintage, still functions and must be recognized on COM 2 when the application starts. Otherwise the app bombs.
I was hoping to leave the old touchscreen to be acknowledged on COM 2 then switch COM 4 input thru COM 2 for the input device.
We are in the USA.

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January 17, 2013 at 10:05:51
Just to get other opions on your issue feel free to post your problem over at

There's some really clever folk over there who have been in the industry for years that may well have dealt with this type of thing in the past. Quite a few of the members are US based and you could say unsupported and obsolete is their passion ;)

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January 17, 2013 at 12:32:11
HI Tc, it might be worth contacting the maker, and asking if any of their current models are 100% compatible (including the dos drivers) with yours.

What is the model of your old touchscreen?

How are the return signals from the touch screen passed back, is there a 2nd interface cable?

Good Luck - Keep us posted.

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January 17, 2013 at 17:12:39
OK Thanks.
I will post there as well

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