Jonathan Campbell

icon location Multimedia and retro MS-DOS/Windows enthusiast. I develop DOSBox-X and DOSLIB, and produce a series of videos about MS-DOS and retro development.

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CTRL+C does not break out of the running program

Yes. CTRL+C is supposed to break out of the program when it calls for input from certain points in INT 21h. As is Ctrl+Break. You can borrow the code from...

Fitup (1997) video bank switching when exceeding segment limit not supported

DOSBox-X developer here: DOSBox-X checks segment limits for specific instructions (most are common variants of MOV) that are often involved in the BitBlt or raster operations of these programs for...

Fitup (1997) video bank switching when exceeding segment limit not supported

> Very interesting @joncampbell123. Segment limit exceptions used for bank switching, well even just reading that makes me feel a bit dirty 😆 Curious what the performance implications of those...