On at 2021-05-20 13:58 +0200, Eric Auer wrote:
Hi Tom and Paul

any EMM386 will redirect ANY interrupt because protected mode.

while I didn't try this, I doubt you will be able to trace ANY
interrupt with debug.

It COULD probably be debugged (by experts) with

https://ulukai.org/ecm/web/#projects-ldebug

Updated link is at https://pushbx.org/ecm/web/#projects-ldebug

or with 386SWAT

http://www.sudleyplace.com/swat/

Actually, the base FreeDOS Debug (including the probably older versions shipped in FreeDOS distros, as well as the recent versions 1.2x from github) can trace software interrupt calls like this interrupt 13h just as well as lDebug. For both, you want to use the "TM 1" command to enable tracing into interrupts, then use the "T" command (or lDebug's new "TP") to do the tracing.

Regards,
ecm


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