[paulio]

I guess it doesn't have to be a pi. The idea would be that the pi would connect to your network and provide the floppy drive into an older system. Any system on the network could command the pi to mount the floppy image to the connected device.

Basically I don't want to have to be constantly moving a usb disk around.

[snvzz]

Ultimately, the pi is unsuitable for deterministic behavior, and Linux is unsuitable for the kind of realtime needed to sample from a floppy directly.

Don't get me wrong: It would be possible to do it, but it would be theoretically not reliable, even if it felt reliable. You'd also need some sort of glue in between, as floppy drives signal at 5v and the rpi isn't 5v tolerant.

Therefore, you could connect the pi to the stm32, rather than directly run the floppy drive from the pi.