[Coco] Another rare brazilian coco clone...

Arthur Flexser flexser at fiu.edu
Mon Jan 28 14:42:55 EST 2013


The question would be, does pulling on the HALT line turn off memory
refresh?  Anybody know?

I know that if you hold down the reset button for more than a few
seconds, memory contents start to degrade, at least on some CoCos.

Art

On Mon, Jan 28, 2013 at 2:00 PM, Luis Fernández <luis46coco at hotmail.com> wrote:
> Let me rephrase the question
>
> Is there a problem for pause the computer for an hour?
> It's like a reset, you only need to press a few moments?
> turns off the video generation, the duration of the pause, as the reset?
>
>> To: coco at maltedmedia.com
>> From: denis.bisson2 at sympatico.ca
>> Date: Mon, 28 Jan 2013 18:14:01 +0000
>> Subject: Re: [Coco] Another rare brazilian coco clone...
>>
>> Daniel Campos <daniel.campus at ...> writes:
>>
>> ...
>> > In the place of the 3.9K and 3.3K resistors, I changed both for 10K
>> > resistors. The 470 Ohms resistor I removed. In the place of the 560 Ohm
>> > resistor I put a 1K trimpot for fine tunning. (1 POT HERE)
>> > On mine I also put two trimpots in pulldown on both B-Y and R-Y lines
>> > that come from 6847 to 1372. (2 POT HERE)
>>   On the picture I saw 4 POT's. What about the fourth ones?
>>
>>   For the B-Y and R-Y signal, you mean you simply add the potentiometer
>> resistor to the ground to ad a load? Or you mean you add a potentiometer and
>> signal is taken from the "wiper" of the potentiometer to be connectoed to the
>> MC1372?
>>
>>   Thanks.
>>
>> Dennis.
>>
>>
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>
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