IBM's MDA cards didn't support direct pixel addressing, which is one of the reasons I had a Hercules Graphics Card (original from 1982). I spent way too much t

IBM's MDA cards didn't support direct pixel addressing, which is one of the reasons I had a Hercules Graphics Card (original from 1982). I spent way too much time trying to get various games to work with SIMCGA. Not only did it cause a massive slowdown (single-digit fps - or worse - was common) as it copied writes to VGA addresses into Hercules address space, the conversion from (e.g.) 320x200@16 onto a display that only supported 720x348@1 created usually required dropping/doubling lines at non-integer ratios, skewing the aspect ratio, and other nasty hacks[1]. I was very happy, years later, when I finally upgrade to a Trident TVGA9000B. [1] http://3.bp.blogspot.com/-To4gB6TtJJs/Uwa-qlr0_rI/AAAAAAAAA9Y/XjMsZE95l6M/s1600/maniac_001.png http://3.bp.blogspot.com/-To4gB6TtJJs/Uwa-qlr0_rI/AAAAAAAAA9...