An intro that fits into and runs from the bootsector. Maximum size depends on the platform's bootsector size, common sizes are for instance 512 bytes or 1024 bytes.
Source code (or a link to it) is included in the archive or on the production page. Note this doesn't necessarily mean the production is free software (FOSS).
1 comment
Based on this one:
https://bunsen.itch.io/ray-tracer-gtia-atari-8-bit-by-d-scott-williamson