HP 9100A/B: Effects of AC power interruption?

[Kiwi Engr]

Quote:my gut tells me this is iffy as some parts may achieve 'wake-up-voltage' a split second before others, which could do god knows what to a running program.

The implication is that if your machine is old (as they all are!), things like power supply voltage and transistor hFE, etc., might no longer be in spec, changing noise margins and set-up times for various circuits, especially during powering up.

Thank you, John! As you point out, HP mentions pressing the STOP key if the machine is on, the CRT has warmed up, and the screen is blank (meaning it's running a program). This minor mention suggests that they regarded this behavior as entirely usual and not worth the printer's ink. ;-)