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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