Re: Hit-and-Miss [CDC Big Iron]
I know CLDR was part of SCOPE or at least CalidoSCOPE (Cal Improved Design Of SCOPE), but the KRONOS machine had been gone three months when I started the Assembly Language class. I do remember warning of making sure the "IDENT" card followed immediately after an END statement card, otherwise SCOPE would get confused. On a related note, a while back I downloaded the COMPASS code for SNOBOL. I still like the way setting registers A1 - A5 triggered a read to the corresponding X register and A6 and A7 triggered a write from the corresponding X registers, along with A0 and X0 being used for ECS reads and writes. On a 6600, the ECS could transfer a 60 bit word every 100 nsec, though my fiber internet connection does 940Mbps up and 930Mbps down.
It was impressive watching the 6400 handle dozens of TTY connections, two card readers with one being a CDC 405, four line printers and at least a couple of tape drives. The CC had an Extended Core Storage cabinet that was originally shared between the SCOPE machine and the Kronos machine. Ten years later, the CC was running networked VAX's running an updated version of the OS the CS department wrote for the PDP-11, though they had to kludge a terminal driver system that would handle the variety of terminals that had been used with the 6400 as well as an SDS machine.
I remember the CDC La Jolla facility having a CDC 3200 in 1971 (along with a bunch of CDC1700s), and the Smithsonian Museum near Dulles has a 3800. The 3000 series machines were basically the CDC 1604 implemented with silicon planar transistors as opposed to the original germanium junction transistors, though the 3200 was to the 3600 as the 6200 was to the 6600.