There were even machines with MS-DOS which were not PC compatible. Only DOS prog...

jacobush on Jan 6, 2020 | parent | context | favorite | on: The Polygons of Another World: IBM PC

There were even machines with MS-DOS which were not PC compatible. Only DOS programs using pure BIOS calls (no direct manipulation of video memory) would work.

echeese on Jan 6, 2020 [–]

And those BIOS calls were so much slower