On 2/23/22 09:43, Paul Koning via cctalk wrote: > I don't know PUTR, but my experience with DOS int13 code in RSTSFLX (built > with DJGPP) is that it worked fine in a DOS window on Win95. And that makes > sense, because Win95 is basically just a bit of UI veneer over DOS. Win NT > is an entirely different thing, of course, and I would not expect DOS low > level I/O to work in Win NT command windows since those really are not DOS.
Maybe for Win95, but Win98 and later uses its own 32-bit port drivers (I'm not certain about 95 OSR2). If running 98 or 95, just do a "shutdown to MS-DOS prompt", rather than opening a DOS Window and you'll be fine. --Chuck