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leecher1337 / ntvdmx64

Run Microsoft Windows NTVDM (DOS) on 64bit Editions
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Old CAD system issues #138

Closed G-Rumpel closed 2 years ago

G-Rumpel commented 3 years ago

Hi, I use an old CAD system called OrCAD which consists of graphical tools for schematic and PCB design, digital simulations etc. Generally it does work under NTVDMx64 with a few small glitches I will try to explain. There is a main process which starts a graphical environment with buttons:

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Each button starts a different tool or a chain of tools which processes data/files forth and back the system i.e. the one's output is transformed and supplied as an input to the next etc. The problem arises when I try to start two different tools one after the other. Then the following error appears:

image

Secondly every tool/chain generates a report in the form of a text file which is opened in a text editor (also 16-bit application). If the tool starts the editor (to see the output) then the previous message appears or there is an error in the output:

image

At the same time all tools work normally if they are started separately (not under the main graphical environment). Generally these are 16-bit processes which start other 16-bit processes which is very similar to #28 which should be addressed some time ago. Last but not the least the CAD system doesn't start under OTVDM at all so my hopes are to find a solution . I will be glad to help in any way if possible. Regards

leecher1337 commented 3 years ago

Do you have installation media so that I can test?

G-Rumpel commented 3 years ago

Hi, I will prepare a ready to use directory and upload it later. There will be no need for installation except copying one file to %SYSTEMROOT%\System32.

G-Rumpel commented 3 years ago

Hi, I have prepared a ready to use package some 15 MB in size. It contains the CAD system, a user guide, a GDI driver and instructions how to start it and reproduce the problem. It would be best if I can send it to your "...dose..." email. It is an old but still copyrighted software and I would like not to make it public. Regards

leecher1337 commented 3 years ago

Hi,

Ok, will treat it confidentially just for testing. Just send me a short mail from your e-mail address so that I can instruct you on how to send it (there is a 10MB size limit on my Mailbox per Mail, iirc).

G-Rumpel commented 3 years ago

Hi, Did you have a time to look at that? Regards

leecher1337 commented 3 years ago

I can reproduce the problem, but analysis may be hard as I suspect that the application is using protected mode code. May take a few weeks/months, need to find time for it.

G-Rumpel commented 3 years ago

OK, I'll be looking forward to it but I won't disturb you. Regards

leecher1337 commented 2 years ago

With latest 2 commits, the problem was fixed on my test machine, no more crashes, can you confirm?

https://github.com/leecher1337/ntvdmx64/commit/0ed03630a54eadc24e2a6b1b8b09700a34ac5bad https://github.com/leecher1337/ntvdmx64/commit/4ff559142b558fa5199b4ceeca2a9b21b1edd6dd

G-Rumpel commented 2 years ago

Hi, First of all, thank you for your efforts and time spent on the subject. I compiled from the latest commit eb0ec38 and everything looked good. I tested many of the tools and experienced no errors. So I consider this issue as closed. If anything arises I will report back further. Once again, thank you very much for keeping this project alive! Regards!