[unleaded]

can you? There's a MAME driver in macprtb.cpp you could work off—might want a few hacks in your implementation which is nothing new to Mac emulation. also this: https://github.com/evansm7/pico-mac

[hedgehog]

I really like this design by John Calhoun (known to me originally for his game Glider, I think he posts on HN as well):

https://www.engineersneedart.com/systemsix/systemsix.html

A wire-free version running a Mac emulator would be pretty slick. Very usable with MacWrite or a HyperCard deck of recipes.