Alpha Micro AM-1000E and AM-1200

These machines had a real following for a reason. Multi-user on hardware that small in the early 80s was genuinely impressive. Glad someone is still writing about them.

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joshu 3 hours ago | parent [-]

How did they get memory protection on 68000?

	▲	Taniwha 2 hours ago \| parent [-]
		68451 or a custom SUN-like (SRAM, kind of like a PDP11) MMU, there was a guy who went around Silicon Valley in the mid 80s designing SUN-like MMUs for companies, they were all different, and some were broken (couldn't protect user space from kernel space). 68000s however had a problem: they couldn't return correctly from a page (MMU) fault (68010s fixed that) for a pre-VM (pre BSD or SVR2) UNIX world - however you could get around this with a few smarts