[Color Computer] Re: [Coco] CoCo and SATA/USB drives.

[James Diffendaffer]

I didn't post a schematic, just links to the chips and a description
of the connections.  You should be able to draw up a schematic for
most of the circuit easy enough.  The address decoding uses a 3 to 8
decoder so you can select what address it's at.  At least that was the
intention.  I hope that was the final version.  It is untested so no
promises that I didn't mess up the active state of any lines.
http://groups.yahoo.com/group/ColorComputer/message/3109
http://groups.yahoo.com/group/ColorComputer/message/3115

The sample scematic for the USB chip would be needed to complete the
circuit since I didn't include that part of the circuit.  The USB chip
is the cypris SL811HS.
http://www.cypress.com/portal/server.pt?space=CommunityPage&control=SetCommunity&CommunityID=209&PageID=259&fid=10&rpn=SL811HS

Oh, and I think the Coco 5v line needed to be reduced to 3.3v to power
the SL811HS.  It is 5v tolerant for signals so nothing else should be
a problem.


--- In ColorComputer at yahoogroups.com, Rudolf Gutlich <inforvale at ...>
wrote:
>
> Hello, 
> 
> where do I find info about this schematics?
> 
> []s
> Rudolf
> 
> --- ColorComputer at yahoogroups.com escreveu:
> 
> >     From: "James Diffendaffer"
> > jdiffendaffer at ...
> >     Date: Wed May 24, 2006 1:49pm(PDT) 
> > Subject: [Coco] CoCo and SATA/USB drives.
> > 
> > Um... what James said.
> > 
> > Even standard IDE DMA modes are way faster than the
> > Coco could handle
> > let alone SATA 150 or 300.  I do like the new
> > cabling though!
> > 
> > USB 1.1 is as fast as a Coco can really use.  It's
> > been done on other
> > 8 bits.  But more importantly... it needs drivers. 
> > Unless
> > I/you/someone wants to rewrite Coco DOS or write OS9
> > drivers you can
> > show it off with test programs and that's about it. 
> > I know dit about
> > OS9 but I'd love to rewrite CocoDOS... right after I
> > finish about 100
> > other projects that are half completed.
> > 
> > I posted a description of what I thought the address
> > decoding circuit
> > and buss adaptation to the required USB chip whould
> > be.  It was
> > standard parts.  Feel free to look it up, ask
> > questions, criticize,
> > correct or whatever.
> > I'd love to see someone build one but I haven't had
> > time.
> > 
> 
> 
> 
> 		
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