[Color Computer] Re: [Coco] CoCo and SATA/USB drives.
jdiffendaffer at yahoo.com
Thu May 25 01:08:41 EDT 2006
Looks like you'll need to look back a few more messages for the rest
of the info. I don't have time to hunt it down now but I'll post
links once I get a chance.
--- In ColorComputer at yahoogroups.com, "James Diffendaffer"
<jdiffendaffer at ...> wrote:
> 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.
> 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.
> 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@>
> > Hello,
> > where do I find info about this schematics?
> > s
> > Rudolf
> > --- ColorComputer at yahoogroups.com escreveu:
> > > From: "James Diffendaffer"
> > > jdiffendaffer@
> > > 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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