Arty computers

[Dave McGuire]

On Feb 1, 2007, at 5:20 PM, Gordon JC Pearce wrote:
>>>> The old GE machines with the "Thousands of Operations Per  
>>>> Second" analogue meters were kind of neat too.
>>> So just how does one construct such a meter?
>>   Have the logic generate a pulse at the beginning (or end) of  
>> each instruction cycle, buffer it, feed it into an integrator, and  
>> then into an analog meter.  Easy as pie.
>
> Not as simple as that - you'd just have an analogue frequency meter  
> showing the instruction rate.

   Right, which is what I interpreted the original poster to mean.   
Was that not what he meant?

> If you wanted it to show how busy the machine is, something in the  
> idle loop toggle the bit that drives the integrator.  Set the bit  
> high when you come out of the idle loop, set it low when you go in...

   That'd work very nicely for a load indicator.

           -Dave

-- 
Dave McGuire
Port Charlotte, FL