[Coco] [Color Computer] Re: New member

Boisy G. Pitre boisy at boisypitre.com
Sun May 15 11:22:09 EDT 2005

On May 15, 2005, at 1:45 AM, James Diffendaffer wrote:

> I got my CoCo's out of storage... does that count as progress?

It's a first step.  Congratulations!

> Actually I have more than that.  I designed some of the parts for PCB
> 123.  I have a partial layout with most of the USB section.  I have
> part of the address decoding, the rest depends on what else goes on
> the board.  I reserved space for an IDE connector but that may change.
>  I've played around with chip placement to see just how much I can fit
> in there but the cheapest design requires a 3.3V part and I don't know
> how the CoCo buss will deal with that.
> I haven't been totally focused on this though.  Most of that was done
> in a couple evenings.
> To do...
> I need to redo the CoCo connector.  It ended up with all pins on one
> side... something got lost in translation and PCB 123 isn't as
> intuitive as I'd like.
> I need to look at the Dragon connector to see if I can make it work
> with just jumpers.
> I'm testing all address bits instead of what I originally suggested
> but I need to finalize the address decoding logic.  What address is
> the other USB interface at?
> I planned on USB + IDE in a game cartridge... but space is kinda close
> so I might use an XD card rather than IDE.  XD uses a simple 8 bit
> interface that requires less logic than IDE.  I might fit something
> else in if I do that.
> My board etching stuff is missing so I'm probably going to order parts
> and wirewrap a proto.
> I had spoken to a rep about this chip a year ago and they never did
> get me the samples they promised.  Who are you getting the chip from?

Sounds like you have your work cut out for you on the hardware end.   
What are your plans for the software?


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