The 80mm minis were envisioned as “CD Singles,” and they actually were defined as part of the official CD standard. Therefore most CD players and drives including slot loaders actually were and are designed to work with them without incident. Typical tray loaders have a smaller indent below the main one to accept the smaller disks, and pretty much all horizontally oriented slot loaders will take them as well.
I was able to insert the mini disks that came with Lego Bionicles on my family’s iMac back in the day. Never had a head-shaped disk, though.
The 80mm minis were envisioned as “CD Singles,” and they actually were defined as part of the official CD standard. Therefore most CD players and drives including slot loaders actually were and are designed to work with them without incident. Typical tray loaders have a smaller indent below the main one to accept the smaller disks, and pretty much all horizontally oriented slot loaders will take them as well.