[Coco] Coco proto board

[Joel Ewy]

Mark McDougall wrote:
> OK, I'm now looking at using an EMP364/128 100-pin TQFP CPLD.
> There's _plenty_ of I/O. :)
>
> I'm thinking of adding a socket for 27C256/512 & footprint for M29F040
> (512KBx8) Flash. The flash will be programmable from the Coco.
>
> All the cart pins (except SND) are routed to the CPLD. This would
> allow the 'address decode fix' for internal devices IIUC.
>
> There's 16 GPIO lines and 8 external CS lines for add-on IO.
>
> I'd imagine you could hook up one-wire/SPI devices at least. I2C might
> be asking a bit much of the CPLD - I'm not sure?!?
>
> Any other ideas? Should I add some dipswitches into the CPLD? LEDs?
> Was going to route SND to the 'prototyping area' of the board...
>
I would think that DIP switches would be a must, but LEDs could be added
on the prototyping area on a per-application basis.  The switches could
be useful for about any project, but the presence, kind, and number of
LED displays would vary quite a bit depending on what you were doing.

JCE
> Regards,
>