I fully agree about maintaning the external appearance. i like the sound
of a retrofit kit, and though it has been pointed out that when it gets
to a certain price one may as well buy a juno, the circuitry means it
just won't be the same.
I like my ex800 and i'm happy to wait for the developement of a retrofit
kit (not enough know how to build one or programme from scratch i'm
afraid) rather than carve it up.
patrioticduo wrote:
> I did entertain the idea of replacing the seven segment displays with
> a 2x24 backlit LCD. But even that is too much to spend.
>
> However, I am planning on putting an LCD interface onto the retrofit
> kit so that I can plug a display in and do diagnostics with it. Also,
> I have a funny feeling that I may have to use the LCD to determine the
> exact memory map used for all the parameters and patch space use.
>
> But the cost of the LCD would be too high for any retrofit kit. I
> mean, when you can pick up all sorts of much higher powered
> synthesizers for a few hundred bucks what would the point of it all be?
>
> This upgrade is 90% ROM and RAM. A few digital pots will allow
> controlling some mod's but I simply refuse to entertain carving up the
> keyboard, drilling holes and messing with the external appearance.
> This mod is going to be an internal upgrade. No messing up a great
> looking vintage keyboard.
>
> I want mine to look like a Poly 800 for my grandchildren.
>
> --- In korgpolyex@yahoogroups.com, Marcus Wilson <JB@...> wrote:
> >
> > Speaking of new features, one thing i was thinking would be uber cool
> > would be to actually display the parameter info in the decal showing
> > the parameters and ranges, and having up/down switches under the up/
> > down parameter switch area. As my own experience is in membrane
> > switches, getting the switch side of things is pretty simple, its the
> > control and the multiplex/demultiplex of the parameter info display
> > that got too hard.
> >
> > Imagine seeing all of the parameters on the poly displayed, and being
> > able to tweak each one at will, instead of needing to fumble thru the
> > parameters one at a time
> >
> > JB over
> >
> > On 24/05/2006, at 3:19 PM, jure zitnik wrote:
> >
> > > if you're planning the digital pot - why not replace the awkward up/
> > > down buttons with a rotary encoder? i guess it's an easy job!
> > >
> > > jure
> > >
> > > On 5/23/06, patrioticduo <patrioticduo@...> wrote:
> > > I'm trying to keep the scope within the realms of sanity.
> > >
> > > So I'm placing initial limits on the hardware upgrade.
> > >
> > > Required outcome: Upgrade the Poly 800 RAM and ROM to support
> > > additional CPU programming related functions. A board will be
> > > developed as part of a retrofit kit that will plug into the existing
> > > ROM socket. The card will have a 2764 EPROM, a 6264 RAM, a 74LS138
> > > decoder.
> > >
> > > Optional outcome: Provide the needed hardware to integrate several
> > > well established mod's (moog slayer, 12/24db filter switch, etc) into
> > > the CPU control and user programming system. Thus, add a 74H174 (6 bit
> > > latch) and a digital potentiometer and other chips as needed to allow
> > > existing and future mod's to be controlled by the CPU.
> > >
> > > I think it very unlikely that we'll run out of CPU cycles handling the
> > > required outcomes. I think it possible that we may run into CPU cycle
> > > restrictions trying to satisfy the optional outcomes.
> > >
> > > If we do find that we run out of CPU cycles then I'm hoping that I'll
> > > know so much about the code that I can port the whole thing to a PC
> > > and release a virtual Poly 800 that will run on your Linux box.
> > >
> > > Mike H.
> > >
> > > --- In korgpolyex@yahoogroups.com, "austeritygirlone" <ziggystar@>
> > >
> > > wrote:
> > > >
> > > > --- In korgpolyex@yahoogroups.com, "patrioticduo" <patrioticduo@>
> > > >
> > > > Keep up the good work! After you've figured out how to controll the
> > > > peripheral synthstuff from the cpu and written a basic OS, that gets
> > > > somethingn done I'm sure that other people will join your efforts
> > > > (like me). But of course doing this is a major obstacle.
> > > >
> > > > And have you thought about replacing the CPU by a more modern
> > > > pincompatible version with more RAM, ROM and more MHz? I know that
> > > > this is possible with the Roland JX-3P CPU (some Intel thing).
> > > >
> > >
> > >
> > >
> > >
> > >
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