I am in the middle of doing this with apple's System 6 and adding a posix-compliant shell under the codename bluetail, and working my way up, i've got it booting with an os, busybox, openssh and stuff. Boots on a raspberry pi 3 A+ bare metal (And qemu, of course). And full usb MIDI support, because (I said so, and) there's actually an incredible catalog of early DAW software that will run on System 6. And pretty decent usb ethernet, sound, webcam etc etc. The future of hobby software is wild.
How did you implement that? Is it like a modified emulator with your enhancements added? How does the System 6 cooperatively multitasking stuff interoperate with the posix stuff?
Woah I never even considered the possibly of rebooting old OS with new features. Very cool. Would love to experience that era of music tech
I am willing to check this out. I have 512Ke and Mac Plus hardware and am always looking for ways to maximize the hardware capabilities.