The //e doesn't have an MMU. There are just soft switches, addresses in the $C03x range you hit to switch banks of RAM. Works the same as the Language Card on the Apple][.
About the closest to Unix anyone ever got was Anix or Anux, which consists of the RWTS portion of DOS 3.3 and a few commands which load from disk and have a Unix-y flavor. No networking, no multitasking, no VM, no remote console, and not developed enough to even use as a base for applications. I worked with a guy once who was a fresh UCB grad and Unix whiz who thought he would base an industrial control system on Anix. He struggled mightily for about a month and gave up. In the end he used DOS and Applesoft, much as it hurt his vanity.
Unix may not be impossible on a 6502, but you'll find it a real challenge. Akin to going 160 MPH on a flat-head Indian. Speaking of hopping up underpowered machines, there are 68000 CPU cards that go in an Apple//e slot. Run the kernel on one of those and the UI on the 6502?
About the closest to Unix anyone ever got was Anix or Anux, which consists of the RWTS portion of DOS 3.3 and a few commands which load from disk and have a Unix-y flavor. No networking, no multitasking, no VM, no remote console, and not developed enough to even use as a base for applications. I worked with a guy once who was a fresh UCB grad and Unix whiz who thought he would base an industrial control system on Anix. He struggled mightily for about a month and gave up. In the end he used DOS and Applesoft, much as it hurt his vanity.
Unix may not be impossible on a 6502, but you'll find it a real challenge. Akin to going 160 MPH on a flat-head Indian. Speaking of hopping up underpowered machines, there are 68000 CPU cards that go in an Apple//e slot. Run the kernel on one of those and the UI on the 6502?