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Curious and weirds Atari 2600 carts.


pcrock

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On 9/17/2020 at 10:51 PM, pcrock said:

I Found another one.
It is a 4 in 1 
The most interesting thing is that in this circuit, the switches are not SPDT devices as in the in MOST OF THEM!

Here the switches are simple on/off ones.

The pins are pulled up by resistors and the switches can push the lines down (when closed). The remaining components are a transistor inverter with speed up circuit at base.

 

image.png.edf91d6c5b13210b111646253b217914.png

 

CARTA.thumb.png.8ce926d707d900a405667fc45a8a2816.png

 

Edited by Danjovic
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23 hours ago, Danjovic said:

 

The pins are pulled up by resistors and the switches can push the lines down (when closed). The remaining components are a transistor inverter with speed up circuit at base.

 

image.png.edf91d6c5b13210b111646253b217914.png

 

CARTA.thumb.png.8ce926d707d900a405667fc45a8a2816.png

 

Woww!!! Very very thanks for the Schematics!!! I really wanted it!!! The engeneer loved 8k2 resistors values!! Ahahahhahahah

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