[Coco] How SLENB works ?

[Luis Antoniosi (CoCoDemus)]

interesting the high density buffer, but how do you control the buffer
direction ? Through the R/W pin ? What about the addresses lines they
shouldn't be reversed even in a read operation, only when the processor is
halt that you could take control of the bus, right ?

Luis Felipe Antoniosi




On Fri, Jul 18, 2014 at 11:46 AM, Matthew Stock <stock at bexkat.com> wrote:

> I did the same thing.  I already built a high density 3.3v buffer for the
> bus (http://www.bexkat.com/coco/DE1%20Coco%20Adaptor.pdf), so that part
> wasn't an issue with the Due or with any other 3.3v logic I wanted to throw
> into the mix.
>
> I actually have a shield design for the Mega that has all the buffer on it
> too.  If anyone's interested in the schematics, let me know.  It was a bit
> of a hack for my own needs, but it will do the job.
>
> I'm not producing these boards any longer, but you can order them via
> OSHPark if you want: https://oshpark.com/profiles/mattstock.
>   -Matt
>
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