I did a few calculations, I don’t remember the specifics of it sadly as it has been over two years since that point and I sadly did not document it back then (or I did, but on a partition I no longer have access to) but I remember having gotten roughly 2 1/2 years of possible runtime before an overflow. Obviously, I wanted to know if this would actually happen in the real game on real hardware.

I read the headline and figured, 60 FPS, minutes hours days, two and a half years, yeah that’s about 2^32 frames. But… this is Ultimate Doom. It was built for 70 Hz displays, and the “tic rate” is 35 Hz. 2^32 / 60x60x60x24 is two years and three months. 2^32 / 70x60x60x24 is just shy of two years.

I guess the PDA version this guy was running simply ran at 85% speed?