Emulator Coder, Skilled player (1140)
Joined: 5/1/2010
Posts: 1217
As to difficulties in encoding DOS (and this is not counting tools): * Multiple resolutions. 720x400 textmode + 640x400 graphics is common. * Sometimes one also sees 640x480 graphics mode (maybe in combination with 640x400) * Really odd resolutions like 640x398 graphics (Jazz Jackrabbit) * Oh, I have also seen 720x480 graphics (and also some SVGA modes). * Music/SFX balance may be off, requiring adjusting channel mixing. * Frame rate is normally about 70.08630289532294fps, but with those oddball modes, all bets are off. And frame rate can vary.