From mboxrd@z Thu Jan 1 00:00:00 1970 From: pnr@planet.nl (Paul Ruizendaal) Date: Thu, 8 Dec 2016 20:24:37 +0100 Subject: [TUHS] Unix & Memory Management Units (MMU) In-Reply-To: <633b4c57-b7c8-e9aa-540c-084582a38704@update.uu.se> References: <633b4c57-b7c8-e9aa-540c-084582a38704@update.uu.se> Message-ID: <575522CD-E8D4-4FD0-910D-9B43136A359E@planet.nl> On 8 Dec 2016, at 19:11 , Johnny Billquist wrote: > So your guessing is pretty good. Not sure I'd say this is similar to how the later PDP-11 MMU works, though. But I can see someone making the comparison, since the PDP-11 pages can vary in size, within limits. Thanks for that info on the PDP-10 MMU! What I meant to say was that the high-low scheme has an echo in how the KL-11 was *used* (not how it *worked*). A standard binary (0407 magic) effectively has two segments in PDP11 Unix: a contiguous low segment (for text, data and bss) and a contiguous high segment (for the stack). Paul