[MomsAVoxell]

I did it many times on CP/M and also DOS.

Never ‘touching the hardware’ was attainable for a great deal many assembly programs.

You could do a lot with 0x10h and 0x21h on DOS.

[pjmlp]

Yes, not much for games though.

[MomsAVoxell]

Oh sure, TSR’s for the logic, BIOS for the graphics calls, and your own lib to wrap it up and make it portable ..