> Jon Elson <el...@pico-systems.com> wrote: >The VAX 11/780 absolutely had power fail, and it DID work.
So did the 11/730 and I imagine the 750 as well. No core, but there was a battery backup option to keep main memory alive and refreshed even in the event of power failure. >I did this quite often while swapping I/O devices and such >after device drivers became loadable. It was (is!) quite handy on the 730 as well. If your configuration has a separate BA11-K for the UNIBUS peripherals, then you can power down that box without turning off the CPU. It took 20-25 minutes to boot up the 730 from a dead start, so this was a great time saver. Bob
