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From: John Levine <johnl@taugh.com>
Newsgroups: comp.arch
Subject: Re: Origins Of Interrupts
Date: Fri, 3 Jan 2025 19:08:22 -0000 (UTC)
Organization: Taughannock Networks
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According to Scott Lurndal <slp53@pacbell.net>:
>This topic prompted me to check the Electrodata Datatron (1954)
>programming and coding manual.  No interrupts, but the boot
>sequence was interesting:
>
> 1) Press the BLOWERS ON button.
> 2) Press the FILAMENT ON button.
> 3) Turn the filament transformer handwheel slowly counter-
>    clockwise until the meter reads 230 volts.  This should take
>    about 30 seconds.
> 4) Press the FILAMENT FAIL RESET button
> 5) Press the DRUM ON button and wait five minutes for tube
>    temperatures to stabilize.
> 6) Press the MOTOR GENERATOR ON button.  An alarm will sound
>    to remind the operator the check the voltmeters.
> 7) Press the DC FAIL RESET button to turn off the alarm.
> 8) Press the DC ON button.

I belonged to a computer club in the late 1960s that met in a barn
full of old computer stuff that belonged to a guy who worked for
Western Electric.  That included an entire Datatron 205.  It was
wired up but we never dared turn it on both due to fire danger
and the stupendous amount of power it would have used.

Based on what I saw, that startup procedure sounds right.



-- 
Regards,
John Levine, johnl@taugh.com, Primary Perpetrator of "The Internet for Dummies",
Please consider the environment before reading this e-mail. https://jl.ly