![]() ![]() NTVDM by the way is a feature that can be activated on Windows 10 Pro but it yet to be seen what exactly can be done with it there. ![]() It runs Windows XP 32 which of course provide 100 percent transparent compatibility via its NTVDM with DOS 16 bit real mode, 16 bits protected (Windows 3.1), and DOS 32 bit extenders. Your best (but not only) solution for running all that is probably XPMode on Windows 7 Pro. There are plenty ready to run ISO images for FreeDOS, one worth mentioning is Seagate Seatools for DOS which is being distributed with the FreeDOS kernel. Once you get a FreeDOS running in a VM you can simply SYS the VHD and start it anywhere. Regarding the creation of a FreeDOS virtual machines, pickup the tools from Microsoft SysInteral. ![]() FrameworkPascal (written in the old version of Watcom) provides a 32 bit extender. c:\dos\emm386 autoĪs for a compiler, Open Watcom seems to me to be the best choice in your situation. This is the autoexec.bat that I use (smartdrv is a bit pointless in this case so I commented it out with "rem" prefix). I had to increase buffers, stacks, and files to avoid a stack overflow problem with this setup. This is the config.sys that I use that seems to work with Win 7 virtual machine. ![]() It's a bit awkward to import / export files to / from the virtual machine. I still have the original floppies and started with those on an old system that has a floppy drive. At Microsoft's support site, they have links to a bootable ISO file for MSDOS 6.22. You could try to create a virtual machine with MSDOS on it, but you'd have to find a way to install MSDOS 6.22 on the virtual machine. Why can't you run the Borland compiler using FreeDOS? If you can find an old Microsoft Compiler, like 16 bit C / C 1.52 (which is included on the 32 bit C / C 4.1 cd-rom), or C 8.00 or earlier, it runs using a dos extender or in a 32 bit dos console window. ![]()
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