From mboxrd@z Thu Jan 1 00:00:00 1970 From: dave@horsfall.org (Dave Horsfall) Date: Sun, 13 Jul 2014 15:02:20 +1000 (EST) Subject: [TUHS] Unix v5 and beyond In-Reply-To: References: Message-ID: On Sun, 13 Jul 2014, Mark Longridge wrote: > I'm interested in comparing notes with C programmers who have written > programs for Unix v5, v6 and v7. I'll try and remember, but this was about 40 years ago... > Also I'm interested to know if there's anything similar to the scanf > function for unix v5. Stdio and iolib I know well enough to do file IO > but v5 predates iolib. Not a chance; about all it had were the system calls. Portable I/O came with either Edition 6 or PWB, then Standard I/O replaced it. I could be wrong, of course... Ed5 may have had getc()/putc() - I dunno. > Back in 1988 I tried to write a universal rubik's cube program which I > called unirubik and after discovering TUHS I tried to backport it to v7 > (which was easy) and v6 (which was a bit harder) and now I'm trying to > backport it to v5. The v5 version currently doesn't have the any file IO > capability as yet. Here are a few links to the various versions: > > http://www.maxhost.org/other/unirubik.c.v7 > http://www.maxhost.org/other/unirubik.c.v6 > http://www.maxhost.org/other/unirubik.c.v5 Hmmm... I must have a peek at them, and for laughs port the v7 one to BSD/Linux/Mac. [...] > My initial impression of Unix v5 was that it was a primitive and almost > unusable version of Unix but now that I understand it a bit better it > seems a fairly complete system. I'm a bit foggy on what the memory > limits are with v5 and v6. Unix v7 seems to run under simh emulating a > PDP-11/70 with 2 megabytes of ram (any more than that and the kernel > panics). Well, complete for the day... Memory limits were basically 64kw for each space (I'm not even sure whether Ed5 had sep/id space). The irony of the PDP-11 was that it could support virtual memory in theory, but simply didn't have enough address registers. Or am I thinking of some other box? > Also I'd be interested in seeing the source code for Ken Thompson's APL > interpreter for Unix v5. I know it does exist as it is referenced in the > Unix v5 manual. The earliest version I could find was dated Oct 1976 and > I've written some notes on it here: > > http://apl.maxhost.org/getting-apl-11-1976-to-work.txt Gawd; I'd love to see APL again! I used it on the IBM-360. > Ok, that's about it for now. Is there any chance of going further back > to v4, v3, v2 etc? Very little; Ed5 was the first public release, so unless an old-timer has them squirreled away somewhere... -- Dave