Discussion about the Korg PolySix synthesizer

>hello it's me again.
>
>well so far it looks like it's quite possible that the main cpu is
>faulty. the full label is
>NEC PD8048c-345
>i have a few questions:
>
>does this microprocessor have internal PROM? if so - do we have a
>binary for it? how would i go about programming it? anyone ever did
>that?
>
>any idea if it could still be available somewhere? any known substitute?
>
>anyone got any of those spare? from a broken polysix maybe?
>
>best regards,
>jure
>
>
>
>
>
>PolySix "Digiest" Page: http://www.acc.umu.se/~amber/Poly6
>Yahoo! Groups Links
>
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>
>
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>

--- In PolySix@yahoogroups.com, The Old Crow <oldcrow@o...> wrote:
>
>
> The 8048 is a factory mask-ROM device. You ("you" being Korg in
this
> case) sent a paper tape roll of the object code to mask into the
device
> to Nec (or Intel) and they made a run of 3,000 or more parts for
you.
> 3,000 was the usual minimum quantity in those days. The "-345" in
the
> part number is probably the index number kept at the factory for
which
> file is masked onto the part.
>
> That being said, there does exist the 8748 and 8749 CPUs, which
are
> EPROM versions. You can still get unprogrammed ones from places
like
> jameco.com. It has to be programmed, which means you need a device
> programmer that can program 8748s/8749s. The binary code file is
also
> needed, which I have around here somewhere. I have made KLM-367,
> KLM-366 and KLM-380 (Trident) CPUs in this manner.
>
> Crow
> /**/
>
> jure zitnik wrote:
>
> >hello it's me again.
> >
> >well so far it looks like it's quite possible that the main cpu is
> >faulty. the full label is
> >NEC PD8048c-345
> >i have a few questions:
> >
> >does this microprocessor have internal PROM? if so - do we have a
> >binary for it? how would i go about programming it? anyone ever did
> >that?
> >
> >any idea if it could still be available somewhere? any known
substitute?
> >
> >anyone got any of those spare? from a broken polysix maybe?
> >
> >best regards,
> >jure
> >
> >
> >
> >
> >
> >PolySix "Digiest" Page: http://www.acc.umu.se/~amber/Poly6
> >Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
> >
> >
>