Korg Poly800/EX800 Users

I don't think it's capable of holding both UP and DOWN at the same time.  It can steady ON Up or Down, but not both at the same time.
I get a glitch once in awhile from perhaps a really bad contact bounce.  But it looks like it always reverses states whenever that happens.  IE I'll be pulsing UP and a pulse DOWN will sneak in there, but the UP pulse (lit LED) goes out everytime it happens and vise versa for the other direction.


Oh and BTW.. I figured out what those CC#'s you have next to parameters on the Parameter Quick Reference charts are for.
They are the NRPN CC#98 value for each parameter.
So if you send CC#98/Value 112, that would select SLFO3 Frequency (P2 #71).. then you'd just send CC06/Value# to change SLFO3's setting.
Pretty handy once I figured out what those numbers were for.
So keep them.. I'd just suggest you change the CC# column header to say something like CC#98 NRPN select#.

I was doing some coding on another product for using NRPN's when I discovered them.. 
So they are not silly at all to be there.  They are VERY helpful.  Just needs clarification what they mean ;)

-Blaine


--- In korgpolyex@yahoogroups.com, Michael Hawkins <korgpolyex800@...> wrote:
>
> Yeah, it would just be much cleaner I think to use a power up reset - yes, just like a CPU power on reset.
> 
> Though, I also think you should keep in mind that your circuit should not hold both Up and Down at the same time at all if you can manage that.
> 
> Mike
> 
> 
> 
> ________________________________
>  From: bimmerfan222 <bperkins211@...>
> To: korgpolyex@yahoogroups.com 
> Sent: Monday, September 17, 2012 4:16 PM
> Subject: [korgpolyex] Re: Data Dial Encoder Project - WORKING!!!
>  
> 
> Â  
> So you're suggesting I make a circuit that is like a power on RESET signal for a CPU?
> 
> Think a 1Mega ohm resistor and 4.7 uF electrolytic capacitor would create a 3-5 second pulse to drive the schmitt's output low to the flipflops CLR inputs?
> Thus causing 1Q and 2Q to both stay at LOW output while powering up the HAWK.
> Hope I'm following this right..
> 
> Cant blame you for not wanting to change the Boot code if a solution is this simple.
> Plus it keeps the "jogwheel" effect in place this way too :)
> 
> I dont have either of those component values on hand.  I'll have to order them in.. along with all the other parts I'll be needing.
> 
> Good to know about the Boot ROM protection.
> 
> Thank you for the suggestion on making a delay signal.
> 
> -Blaine
> 
> --- In korgpolyex@yahoogroups.com, Michael Hawkins <korgpolyex800@> wrote:
> >
> > I would recommend that you use a simple reset circuit to hold the two flip flops in the dormant state for a second after power up.
> > 
> > A simple resistor and capacitor fed into one of the 74HC14 gates will provide a delayed reset. Feed the output into the clr on the flip flops.
> > 
> > I don't really want to change the boot code; especially when you have two spare gates on the 74HC14 to use for a power on delay circuit.
> > 
> > 
> > The boot ROM can't be written to when it is in the boot socket. So there's no chance of it being corrupted - ever, while it's in the boot socket location.
> > 
> > 
> > Mike
> > 
> > 
> > 
> > ________________________________
> >  From: bimmerfan222 <bperkins211@>
> > To: korgpolyex@yahoogroups.com 
> > Sent: Sunday, September 16, 2012 5:52 PM
> > Subject: [korgpolyex] Re: Data Dial Encoder Project - WORKING!!!
> > 
> > 
> >   
> > 
> > 
> > --- In korgpolyex@yahoogroups.com, Michael Hawkins <korgpolyex800@> wrote:
> > >
> > > You could use the two spare schmitt triggers in the 74HC14. By the way, you should use HC series, not LS.
> > > 
> > > Mike
> > 
> > I guess I'm at a disadvantage at how to use the schmitt triggers to accomplish this.  Any pointers?
> > 
> > The LS package was the only one I had in my TTL/CMOS stash.   I'll get some HC's in my next part's order.
> > 
> > --- In korgpolyex@yahoogroups.com, Michael Hawkins <korgpolyex800@> wrote:
> > >
> > > I could change the boot code for you. Such as, hold down Bank Hold and then Up or Down to engage the clear function.
> > > 
> > > Easy to do. 
> > 
> > That would be the better version in my opinion.  That way I can retain my "jogwheel" feature. 
> > I'm guessing it's wise to keep the CLEAR function in the event a corrupt code bricks the Korg up?
> > 
> > Is the 1.5b kit you sent me able to reflash the Boot Rom?  Is it wise for me to get an extra Chip so I can make a backup Boot Rom?
> > If I somehow compromise my only boot code while poking and prodding into the synth, I'm SOL until I get another chip.
> > 
> > -Blaine
> >
>