I thought the CDC CYBER and 6000 series mainframes were great systems which performed admirably for what they were designed for. I liked COMPASS, SYMPL and NOS 1 and 2. I didn't do much work in CYBIL, but it was basically an enhanced version of PASCAL suitable for operating systems work. What is there not to like? These mainframes and the CDC 7600 outperformed every other machine until Seymour Cray released his own machines.
On Thu, May 16, 2024 at 11:08 AM Ken Seefried via cctalk < cctalk@classiccmp.org> wrote: > I came to it all a bit later. I do recall the CDC salesthing saying > something like "oh, you guys have some Unix around here? Have we got > something for you!". And the systems guys brought up NOS/VE on the last > CDC machines we ever bought. > > On Wed, May 15, 2024 at 10:43 PM Chuck Guzis via cctalk < > cctalk@classiccmp.org> wrote: > > > On 5/15/24 18:47, Ken Seefried via cctalk wrote: > > > > > Please...I'm trying very hard not to remember them (or NOS...worse, > > NOS/VE). > > > > I left CDC at around the time that SCOPE 3.4 was being renamed NOS BE > > and KRONOS was becoming NOS. I remember attending a design meeting for > > the pager in what was to become NOS/VE. I asked the presenter if he'd > > conferred with any of the virtual memory pager talent that CDC had > > in-house. Blank stare. I informed him that the STAR-100 people had > > lived in that particular hell since about 1969--and that demand paging > > was not the way to run a shop. STAR had long-since switched to a > > working set algorithm. > > > > Even that wasn't enough. If one selected a large (65 KW) page size and > > set up certain vector instructions so that addresses crossed page > > boundaries, it was impossible to get the required pages into memory all > > at once. > > > > The system just sat there and thrashed.... > > > > --Chuck > > > > >
