On Sat, 2025-02-15 at 17:19 -0500, Paul Koning via cctalk wrote: > Oh? Certainly by today's standards a drum memory machine is quite > slow. But in their day they were used for serious work.
For more than 16 years at JPL, we used Univac 1108, later 1110, 1100/40, then 1100/80, then Clearpath 2200 (CMOS ICs instead of bipolar discrete). In the 1108s, we had eleven core-loads of swap on FH432 (4 millisecond) drums. We ran fifty demand jobs and ten batch jobs, pretty much 24/7. Univac said it was impossible to do that much, but they weren't interested in having Tom Lang's modifications or tunings to EXEC 8 (later OS/1100).
