[sdiy] TOG Substitute - CPLD

[James Patchell]

The Xilinx Cool Runner CPLDs are not expensive at all...I believe they 
start at $5....and they are in circuit programmable (they use a JTAG port, 
so you just need a special cable that only costs about $50 or so).  The 
problem is the parts are surface mount only :-( which makes them not very 
freindly for SDIY....

There are also the Xilinx 9500 series, which are also fairly inexpensive 
(see Digikey), in the $5->$10 range, and are also in circuit programmable .


And the software to write the code is free...

At 09:00 AM 12/15/2003 -0700, Scott Gravenhorst wrote:
>See, we love ya, Tim!  Got it covered.  I don't know how much
>work that entails (and sorry to hear about the loss of the
>files, I hate it when that happens), but it seems that there
>is at least some passive interest.  While I do have an
>MK50240, I have only the one, I don't know if it still works
>even (been in a drawer for years), but I do want to play with
>a TOG synth one day again.  I had a 4 voice synth working
>with it years ago, powered by a ONE MEGAHERTZ CPU (6800).
>
>Curious, how expensive are the CPLD devices you used?  and
>how expensive is the programmer?  Is a CPLD like a PROM or
>does it need to be loaded with data each time it's powered up?
>
>Tim Ressel <madhun2001 at yahoo.com> wrote:
> >Yo,
> >
> >Hey, its Me!!  I'm still around. Sorry for the website
> >snafu. Here is the new URL:
> >
> >http://home.comcast.net/~t.ressel/synthdiy.html
> >
> >Thanks for bringing it to my attention.
> >
> >As for the TOG effort, the status is 'Not Quite Ready
> >Yet'. The CPLDs had a problem, then by machine got
> >funny and I futz-fingered during the fix and lost the
> >files for the TOG development. If there is interest I
> >can get back on it and rebuild the TOG files.
> >
> >--Tim Ressel
> >
> >
> >
> >
> >--- Scott Gravenhorst <music.maker at gte.net> wrote:
> >> Thanks to my Synth-DIY website archive, I found out
> >> who did
> >> this.  It was Tim Ressel, but unfortunately, the
> >> site
> >> http://home.attbi.com/~t.ressel/ is gone.  Wayback
> >> doesn't
> >> seem to know anything about it either.  Is Tim still
> >> around
> >> here?  Did I miss his web site change announcement?
> >>
> >>
> >> My archive shows that he had done this with a CPLD,
> >> but the
> >> list item on his Synth-DIY page has no link to a
> >> page for
> >> details about this.  Content searches of the files
> >> in that
> >> directory come up empty.
> >>
> >>
> >=========================================================
> >>
> >> - Where merit is not rewarded, excellence fades.
> >> - Hydrogen is pointless without solar.
> >> - What good are laws that only lawyers understand?
> >> - The media's credibility should always be
> >> questioned.
> >> - Governments do nothing well, save collect taxes.
> >>
> >> -- Scott Gravenhorst | LegoManiac / Lego Trains /
> >> RIS 1.5
> >> -- Linux Rex         | RedWebMail by RedStarWare
> >> -- FatMan: home1.gte.net/res0658s/FatMan/
> >> -- NonFatMan: home1.gte.net/res0658s/electronics/
> >> -- Master of Arcane and Hidden Knowledge.
> >>
> >
> >
> >__________________________________
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> >
>
>=========================================================
>- Where merit is not rewarded, excellence fades.
>- Hydrogen is pointless without solar.
>- What good are laws that only lawyers understand?
>- The media's credibility should always be questioned.
>- Governments do nothing well, save collect taxes.
>
>-- Scott Gravenhorst | LegoManiac / Lego Trains / RIS 1.5
>-- Linux Rex         | RedWebMail by RedStarWare
>-- FatMan: home1.gte.net/res0658s/FatMan/
>-- NonFatMan: home1.gte.net/res0658s/electronics/
>-- Master of Arcane and Hidden Knowledge.

         -Jim
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