From mboxrd@z Thu Jan 1 00:00:00 1970 From: dot@dotat.at (Tony Finch) Date: Mon, 27 Nov 2017 14:50:04 +0000 Subject: [TUHS] Harvard and Von Neumann Architectures and Unix In-Reply-To: <6b6fd55e-d1f9-5ee2-42ac-309d6b2923b3@gmail.com> References: <6b6fd55e-d1f9-5ee2-42ac-309d6b2923b3@gmail.com> Message-ID: Will Senn wrote: > In my naive understanding, the PDP-11 itself, with the Unibus and > apparently agnostic ISA seem to summarily reject the Harvard > Architecure... > > My question is - was there tension around Harvard and Von Neumann > architectures in Unix circles and if so, how was it resolved? Well, there were PDP-11 models with split instruction and data address spaces, so you could address 64K of code and 64K of data without overlays. Tony. -- f.anthony.n.finch http://dotat.at/ - I xn--zr8h punycode Shannon, Rockall, Malin, Hebrides, Bailey: North or northwest 5 to 7, occasionally gale 8 except in Shannon. Rough or very rough, occasionally moderate. Squally showers. Good.