A good article of the correct aspect ratio of DOS games

[MrFlibble]

Gamasutra: Felipe Pepe's Blog - No, MS-DOS games weren't widescreen: Tips on correcting aspect ratio

[evktalo]

That was a good one indeed! I've talked a lot with a friend about the aspect ratios (and the effect of CRT on graphics - love that Sonic 2 waterfall example at the end). Gotta put those tips to use.

[DOSGuy]

It's a problem for this site, for sure. The author only talked about VGA, but we also have EGA's 640x350, which is a 64:35 ratio. Have fun with that one. Then you have Hercules' 720x348 (60:29).

[MrFlibble]

Here's another great post on the subject:
Retro-gaming Enthusiasts Are Getting It All Wrong

[MrFlibble]

Recently I came across a few more interesting sources on the subject, which I am presenting here in no particular order:
DOS Gaming Aspect Ratio - 320x200
The Quest for Pixel Perfect DOS Emulation
320x200 : The Resolution of Choice for the IBM PC
Classic DOS Pinball Games, Mode X and What they can Teach Us about Aspect Ratios
Oddball EGA and VGA Resolutions, When the Standard Resolutions Aren't Used
Jazz Jackrabbit on an actual CRT

[OleBumma]

Gamasutra: Felipe Pepe's Blog - No, MS-DOS games weren't widescreen: Tips on correcting aspect ratio

very well thought concept.
always been a pain for me whenever I need to convert or resize images of any kind, and the thing that some old games I play seem to look like crap when I play them in emulators that try to emulate their vanilla graphic and behavior always affected on my experience of enjoying the game, 'cause I don't remember them looking so weak back when I used to play them in the 90's.

I never play them fullscreen, but I also never play them at small graphic size 'cause, well, myopia has to be a part of aging I guess. :p
that said, I wish I still had an old computer system with me to fiddle around with, even just to go back once more to the original experience.

[MrFlibble]

Have you ever tried CRT imitation shaders in DOSBox?