The demo playback on 8-bit games was rarely more than a few seconds long, and it's just a capture of input data. Here's Super Mario Bros's demo replay data: ht

The demo playback on 8-bit games was rarely more than a few seconds long, and it's just a capture of input data. Here's Super Mario Bros's demo replay data: https://gist.github.com/1wErt3r/4048722#file-smbdis-asm-L1083-L1109 https://gist.github.com/1wErt3r/4048722#file-smbdis-asm-L108... 21 bytes of joypad input and 21 bytes of input timings