[Coco] Dynamic RAM Q

[Gene Heskett]

On Friday 06 October 2006 20:28, Robert Gault wrote:
>Phill Harvey-Smith wrote:
>><snip>
>> One final curious thing about this setup is this, if I turn the machine
>> on, type a 2 line 10 Print "Phill was here "; 20 Goto 10 type program,
>> and run it, it runs. If I then turn the machine OFF for 5 seconds and
>> then back on again, and type RUN it's still there !!!! I have also
>> noticed this on some CoCo 1/2 models too, so much for Dynamic ram
>> needing to be refreshed :) :) :)
>>
>> Cheers,
>>
>> Phill.
>
>Try that with a voltmeter on the +5v line. It would be interesting to
>know whether the power supply caps store enough energy to keep the RAM
>alive for several seconds.

Chuckle, if the 5 volts is there, then so is the refresh because the cpu is 
still running as is the clock generator.  And with a 63c09 in it, the 5 
volts will hold up quite a while.

-- 
Cheers, Gene
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