How to debug dos real32 dpmi program?

Turbo debugger can not ?

to debug programs, in real mode, in real 32 dpmi, in protected mode, in v86, and for all processors, the best is to know how the processor works.

then, while running, if there are bugs, you can find them by reading the source and the binaries.
for exemple, i never use any debugger. all the debug is in my brain.
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GRDB and 386SWAT and FreeDOS DEBUGX can all debug DOS pmode programs. Your best bet is probably to try them all to see which suits you the most. You can also use OpenWatcom's debugger or even Japheth's debug tools.

N.B. Some of these don't work as well (or at all) under some Windows (e.g. GRDB under Win9x, 386SWAT on Win2k or newer), so caveat emptor.

> How to debug dos real32 dpmi program?

There is no "real32 dpmi" ...

There is real/unreal-16/32-mode and DPMI (16-bit or 32-bit).

To debug 32-bit DPMI programs, use Japheth's DebugX or deb32 .

> Turbo debugger can not ?

No idea, I don't have/use it.

F.A.Q.

Even a simple print statements can assist in debugging immensely. Each print statement is a checkpoint and can also give some internal values and conditions.