Re: Origins Of Interrupts

On Fri, 3 Jan 2025 18:08:18 +0000, Scott Lurndal wrote:

>
If he read the web page, he wouldn't need to post..
>
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.

This reminds me of the startup procedure for our Lola T70 race
car, a 750 HP 350 CID SBC::
1) 30 minutes before starting the car, stick the oil heater into
..dry sump and plug in.
2) 5 minutes before starting the car, attack the drill to the
..mechanical oil pump, and run for 2 minutes to pressurize
..the engine oil passages, and to warm the block.
3) remove spark plugs
4) remove fuse for electrical fuel pump
5) spin the engine until the engine oil pump gets up to pressure.
6) install spark plugs, remove oil heater
7) install fuel pump fuse
8) sprit ether into all 8 velocity stacks
9) spin engine
10) if it does not start after 3 seconds goto 8
11) warm engine at 2,000 RPMs for 3 minutes
12) allow to idle at 1,500 RPMs.
13) check level and add 116 octane fuel as needed