Arty computers

woodelf bfranchuk at jetnet.ab.ca
Thu Feb 1 12:20:39 CST 2007


Jim Battle wrote:

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>>> The old GE machines with the "Thousands of Operations Per Second" 
>>> analogue meters were kind of neat too. 

> One way: pick off some signal that fires once per instruction execution 
> -- say some signal that occurs in a particular decode phase of the 
> logic.  Buffer it and send it through a simple RC filter, which feeds 
> the meter.  Add a pot to scale things properly.  The more instructions 
> executed per second, the more pulses per second, the higher the average 
> voltage put out by the filter.  You might even be able to skip the RC 
> filter since the meter has inertia.

I wonder what the meter RED Lined at? Did it meter all instructions
or just user tasks?


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