Does the Roland custom chip IC2 ever fail 1 2

On 21/04/2011, at 2:56 PM, kiwitechnics wrote:

 

Hi from Kiwitechnics

I have looked at the JX-10/MKS-70 a while back as possible candidates for a rewrite. There is one rather large problem though. It comes in the form of the Roland custom chip (IC2) which Roland call a 'gate array' but is in reality a second CPU. This looks after keyboard scanning and provides the master system clocks. Unless someone has detailed data on this chip the only way I can see to get around this is to redesign the assigner board which will add to the cost. Also the voice board programs will no doubt need rewriting and possibly a different cpu which will add still more cost. These may not be viable candidates but when things quieten a little I will look into it further.

Regards
Murray

--- In kiwitechnics@yahoogroups.com , David Bulog <d2ba@...> wrote:
>
> thanks Florian
> that is very encouraging
> On 21/04/2011, at 11:32 AM, Florian Anwander wrote:
>
> > HI David
> >
> >> Anyone here like the the MKS-70 and Super JX keyboard and idea of a CPU
> >> upgrade for these
> > I played a Super JX a long time ago, but don't remember well. As a Super
> > JX is two JX-8Ps, which again are a quite similar in regards of voice
> > hardware to the JX-3P, it should not be too difficult to adopt the
> > firmware of the uP.
> > But to be honest: there is not that much difference in the sound
> > creation section between a JX-8P and a kiwitechnics JX-3P. So the most
> > advantages might be seen in adding the
> > Sequencer/Arpeggiator/Chordmemory/Pattern-stuff.
> >
> > Florian
> >
> >
> > ------------------------------------
> >
> > Yahoo! Groups Links
> >
> >
> >
>