[Coco] *SLENB behavior?

Barry Nelson barry.nelson at amobiledevice.com
Thu Nov 10 11:33:56 EST 2016

You could probably find at least one cartridge that would try to spin it in circles if that were possible, but that doesn’t make it normal. What is the silly misdesigned cartridge that tries to hold it high anyway?

> RETRO Innovations go4retro at go4retro.com  <mailto:coco%40maltedmedia.com?Subject=Re%3A%20%5BCoco%5D%20%2ASLENB%20behavior%3F&In-Reply-To=%3Ceb2f3018-0ac6-f755-ea3d-2c7f7caab94c%40go4retro.com%3E>
> Wed Nov 9 22:45:01 EST 2016
> Though I *think* I know the answer to this question, I'd like to get 
> more opinions on the behavior of *SLENB.  I assumed *SLENB is a signal 
> to be treated like RESETB.  Namely, the signal is weakly pulled high and 
> any number of devices can pull *SLENB low if needed to offer functionality.
> The internal wiring of the 'G' line of the '138 to *SLENB with the 4.7K 
> pullup suggests this usage, but I've found a cartridge that appears to 
> hold *SLENB at an active high state, preventing other cartridges from 
> pulling the line low.
> I thought I would check with others, since I am new here.
> Jim

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