From mboxrd@z Thu Jan 1 00:00:00 1970 From: ron@ronnatalie.com (Ronald Natalie) Date: Mon, 2 Jun 2014 10:29:30 -0400 Subject: [TUHS] Gnu/Stallman (was Bugs in V6 'dcheck') In-Reply-To: <20140602142446.GM18282@mercury.ccil.org> References: <201406020209.s5229Q5o006174@stowe.cs.dartmouth.edu> <20140602142446.GM18282@mercury.ccil.org> Message-ID: <7DC97BD4-337C-4E32-9EA3-AA485923AC97@ronnatalie.com> On Jun 2, 2014, at 10:24 AM, John Cowan wrote: > Ronald Natalie scripsit: > >> Still with all it's flaws, on the 286 and later UNIX actually did run in >> protected mode, something it took ages for DOS/Windows (one can argue >> backwards compatibility with the early processors) or Apple (no excuse >> here, the early Macs were 68000's which had protection) to pick up upon. > > The original Mac 128K was a 68000 processor, and IIRC memory protection > didn't arrive until the 68020. > > -- Yeah, you're right. You could get it off-chip with the -010 or it was integrated with the -020.