>it didn't have an MMU It didn't, but the real issue wasn't that it didn't have one. It was that it didn't support one. Specifically, the stack frame the 6800

>it didn't have an MMU It didn't, but the real issue wasn't that it didn't have one. It was that it didn't support one. Specifically, the stack frame the 68000 pushes on bus error lacks the information to allow recovery (retrying). 68010 solved this. Many UNIX workstations are based on the 010, some use Motorola's MMU chip, most use custom designs.