I wrote a DVI previewer for VM/CMS back in the 80s that I kind of wish the source code for was still around somewhere, just to see how bad my coding was when I

I wrote a DVI previewer for VM/CMS back in the 80s that I kind of wish the source code for was still around somewhere, just to see how bad my coding was when I was a teenager. The awful thing I remember was that there was no caching of bitmap font data so with every character, the program re-read the bitmap from disk.