12. Hardware #1
No fans
Conductive cooling
Viewing the thermo world with copper
Sealed
Spark immunity – welding?
Stunt – memory – process
13. Hardware #2
No “off” switch
Looks good to manufacturing
Power voltage insensitive
Rugged
Cost is a bad word
14. Software
For the electrician
• For the problem, not the academics
Sample rate a constant
• Problem speed – not computer speed
• Quantum thinking
• A lump of energy in the power
15. Language #1
Language
Memory
• Shannon
Hard real time
Never wanted to repair
Come from, not go to
RLL
16. Language #2
Standalone lines of logic
No interrupt
Relay, not Boolean
Constant scan, independent of activity
Only four contacts per line
We got no respect from MIT
18. Market #1
Not a computer
• Erased boards
Started – CNC – not another piece of
colored sheet metal
Angel – never original product
Low hanging fruit – Ford
19. Market #2
What is it?
• Box of relays – relays complexity
constrained
Time to market
• Months to weeks
Runs “forever”
24. Users
GM story
• PDP – 16
• Never knew
GE story
Landis grinding
• Plane and crash – welding cable
• Japan – Yaskawa and Toyota
25. Competition
After the fact
GE OEM by Modicon
Odo Struger
• Management vs. tech
PDP-II, RT II
Relays – backup?
26. Me
Never an employee
Temp president for
several weeks
084 to 184
(Morley to Greenberg)
Number and name –
job and Schwenk
Machinist and physicist