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On Fri, 3 Jan 2025 21:15:41 +0000, Thomas Koenig wrote:
MitchAlsup1 <mitchalsup@aol.com> schrieb:
13) check level and add 116 octane fuel as needed
116 octane fuel? Did you find any lead lining the exhausts?
16.5:1 compression
SMC heads and block
at least 6 oil lines external to the block+heads
750 HP 600 lb×ft
9,300 Red Line
Hewland 5 speed transmission
and it weighted only 1600 pounds
The fuel mas mainly Toluene, benzene, and Acetone, with some other
bad stuff in there.
Unlike Sunoco 260 it smelled horrid going in, but smelled great coming
out of the tail pipes.
MitchAlsup1 wrote:
On Fri, 3 Jan 2025 21:15:41 +0000, Thomas Koenig wrote:
MitchAlsup1 <mitchalsup@aol.com> schrieb:
13) check level and add 116 octane fuel as needed
116 octane fuel? Did you find any lead lining the exhausts?
16.5:1 compression
SMC heads and block
at least 6 oil lines external to the block+heads
750 HP 600 lb×ft
9,300 Red Line
Hewland 5 speed transmission
and it weighted only 1600 pounds
The fuel mas mainly Toluene, benzene, and Acetone, with some other
bad stuff in there.
"bad stuff"?
As one of the people who are allergic to natrium benzoate, I have a very healthy respect for the reactive qualities of a carbon hex ring with alternating single and double bounds.
Unlike Sunoco 260 it smelled horrid going in, but smelled great coming
out of the tail pipes.
The only good benzene is a fully oxidized version?
Trying to find the relevance to computer architecture... and
not really succeeding :-)
MitchAlsup1 wrote:
On Fri, 3 Jan 2025 21:15:41 +0000, Thomas Koenig wrote:
MitchAlsup1 <mitchalsup@aol.com> schrieb:
13) check level and add 116 octane fuel as needed
116 octane fuel? Did you find any lead lining the exhausts?
16.5:1 compression
SMC heads and block
at least 6 oil lines external to the block+heads
750 HP 600 lb×ft
9,300 Red Line
Hewland 5 speed transmission
and it weighted only 1600 pounds
The fuel mas mainly Toluene, benzene, and Acetone, with some other
bad stuff in there.
"bad stuff"?
As one of the people who are allergic to natrium benzoate, I have a
very healthy respect for the reactive qualities of a carbon hex ring
with alternating single and double bounds.
Unlike Sunoco 260 it smelled horrid going in, but smelled great
coming out of the tail pipes.
The only good benzene is a fully oxidized version?
Terje
There should be a reason why derivatives of benzen used to be called 'aromatic compaunds' in chemestry books.
There is an Asianometry video which says that the first computer to have >interrupts was the Univac 1103.
Does this sound right? What’s the earliest architecture anybody knows of >that had support for interrupts?
According to Lawrence D'Oliveiro <ldo@nz.invalid>:
There is an Asianometry video which says that the first computer to
have interrupts was the Univac 1103.
Does this sound right? What’s the earliest architecture anybody knows
of that had support for interrupts?
This informative web page repeats that claim but then says he thinks the Univac I had an overflow trap several years earlier:
https://people.computing.clemson.edu/~mark/interrupts.html
This informative web page repeats that claim but then says he thinks the
Univac I had an overflow trap several years earlier:
https://people.computing.clemson.edu/~mark/interrupts.html
OK, but an overflow trap is a synchronous notification from the CPU to do >with the current instruction.
To be clear, I was specifically thinking of asynchronous notifications to
do with external conditions (typically I/O).
On Fri, 3 Jan 2025 03:25:32 -0000 (UTC), John Levine wrote:
According to Lawrence D'Oliveiro <ldo@nz.invalid>:
There is an Asianometry video which says that the first computer toThis informative web page repeats that claim but then says he thinks the
have interrupts was the Univac 1103.
Does this sound right? What’s the earliest architecture anybody knows
of that had support for interrupts?
Univac I had an overflow trap several years earlier:
https://people.computing.clemson.edu/~mark/interrupts.html
OK, but an overflow trap is a synchronous notification from the CPU to do with the current instruction.
To be clear, I was specifically thinking of asynchronous notifications to
do with external conditions (typically I/O).
According to Lawrence D'Oliveiro <ldo@nz.invalid>:
This informative web page repeats that claim but then says he thinks the >>> Univac I had an overflow trap several years earlier:
https://people.computing.clemson.edu/~mark/interrupts.html
OK, but an overflow trap is a synchronous notification from the CPU to do >>with the current instruction.
To be clear, I was specifically thinking of asynchronous notifications to >>do with external conditions (typically I/O).
Hmmn. Is there some reason you were unable to read that web page? If you >had, you'd know the answer.
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.
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.
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.
13) check level and add 116 octane fuel as needed
MitchAlsup1 <mitchalsup@aol.com> schrieb:
13) check level and add 116 octane fuel as needed
116 octane fuel? Did you find any lead lining the exhausts?