Re: [TUHS] PWB - what is the history?

It would be great to have some inside info about the relationship among the Research, USG and PWB systems. Clearly there was comunication, and things got passed around, but we know so little about what was happening during the period between V6 and V7 when a lot happened (e.g. the changes to C, just mentioned). E.g. check out the PWB1 version of exec(): https://minnie.tuhs.org//cgi-bin/utree.pl?file=PWB1/sys/sys/os/sys1.c It's been changed from V6 to copy the arguments into swap space, _not_ buffers allocated from the system buffer pool (which is how V6 does it). So, who did this originally - did the PWB people do it, or was it something the research people did, that PWB picked up? I used to think it was USG, but there's a 'Unix Program Description' document prepared by USG, dated January 1976, and it's still clearly using the V6 approach. The PWB1 release was allegedly July, 1977: https://minnie.tuhs.org//cgi-bin/utree.pl?file=PWB1 (Which is, AFAIK, the _only_ set of sources we have for after V6 and before V6 - other than the MIT system, which seems to be basically PWB1.) So who did the exec() changes, originally? And I could list a bunch more like this... Noel