Korg Poly800/EX800 Users

 Subject: [korgpolyex] Re: EX800 vs Poly800 Eprom differences
 To: korgpolyex@yahoogroups.com
 Received: Tuesday, June 4, 2019, 9:27 PM
 
 
  
 
 
 
   
 
 
     
       
       
       So, I've installed a poly-800 eprom
 marked #830236 into the EX800 and was able to calibrate the
 unit, all waveforms accounted for. The EX-800 eprom is
 marked #840206 is that the appropriate one..? if it is then
 it looks like its not good, Does someone have a BIN of the
 EX-800 eprom ??
 Thank you
 
 
     
      
 
     
     
 
 
 
 #yiv8237594643 #yiv8237594643 --

> So, I've installed a poly-800 eprom marked #830236 into the EX800 and
> was able to calibrate the unit, all waveforms accounted for. The EX-
> 800 eprom is marked #840206 is that the appropriate one..? if it is
> then it looks like its not good, Does someone have a BIN of the EX-
> 800 eprom ??
> 
> 
> 
> Thank you
> 
>

 Subject: Re: [korgpolyex] Re: EX800 vs Poly800 Eprom differences
 To: korgpolyex@yahoogroups.com
 Received: Tuesday, June 4, 2019, 10:23 PM
 
 
  
 
 
 
   
 
 
     
       
       
       
 
 
 
 
 
 
  
 I have them right here: http://www.hawk800.com/downloads/
 /Mike
 On Wed, 2019-06-05 at 01:27
 +0000, studio_1a@... [korgpolyex]
 wrote:
  
 
 
 
     
       
       
       So, I've installed a poly-800 eprom
 marked #830236 into the EX800 and was able to calibrate the
 unit, all waveforms accounted for. The EX-800 eprom is
 marked #840206 is that the appropriate one..? if it is then
 it looks like its not good, Does someone have a BIN of the
 EX-800 eprom ??
 Thank you
 
 
     
      
 
     
 
 
 
 
 
 
 
 
 
     
      
 
     
     
 
 
 
 #yiv4722849358 #yiv4722849358 --

> Well after installing the newly programmed eprom it still did not
> work, but strangely enough it works fine with a Poly-800 eprom. I
> found another version of ex800 eprom, will try that tomorrow. I
> wonder if eprom labeled 840206 is correct one for ex800? 
> 
>

> Hey Mike, what I meant was, it fires up and all but there are no
> sounds even after I re-program a few sounds manually there's still
> nothing, the board is Klm596-7. I noticed that with the EX-800 eprom
> (now two different BIN files) I wasn't getting CPU Res6.5 but all
> other waveforms are present, So I went on a replaced a few IC's IC26,
> DTA1 and a few others but still no Res6.5. I popped in the Poly800
> eprom and everything works CPU Res6.5 pulse is present from IC26 to
> IC24 and the few sounds I programmed manually are playing..I find
> this very strange that I have to use poly800 eprom, for me the
> differences should be minor between the two, but I don't understand,
> do you?
> 
>

> Ok this could turn out to be an interesting fact, I have captured all
> 11 waveforms from A>L from the KLM596 schematic on my Tektronix scope
> including the said CPU RES6.5 without any midi hookup at all and it
> looks identical, this from my POLY800 KLM596-4 w/830236 eprom(1). The
> EX800 KLM596-7 also works with the same eprom(1) and same waveforms
> confirmed.
> 
> Now, and I'm just trying to figure out the EX800 issue, is it then
> that because the EX800 does not have a keyboard the 63B50 waits on a
> keyboard pulse thru RX_data first to send /IRQ pulse to CPU RES6.5?
> I'm pretty sure the RES6.5 is necessary as I can witness this on my
> POLY800 without any midi,
> 
> Is that the correct process for the EX800 ?
> 
> Because I did hook up a controller keyboard to the EX800 and got no
> sounds from it even after manually programming a few, that's when
> replaced some IC's and finally swapped eproms and confirmed the
> KLM596 -7(EX800 & eprom(1)) was working fine in my Poly800. Then
> programmed 2 new EX800 #840206 eproms and still no sound and no
> RES6.5,
> 
> Tonight, I will put the Poly800 aside and concentrate on the EX800
> pulses,
> 
> I'm pretty sure its not the eprom but something has to give..
> 
> 
> 
> 
> 
>

> Ok this could turn out to be an interesting fact, I have captured all
> 11 waveforms from A>L from the KLM596 schematic on my Tektronix scope
> including the said CPU RES6.5 without any midi hookup at all and it
> looks identical, this from my POLY800 KLM596-4 w/830236 eprom(1). The
> EX800 KLM596-7 also works with the same eprom(1) and same waveforms
> confirmed.
> 
> Now, and I'm just trying to figure out the EX800 issue, is it then
> that because the EX800 does not have a keyboard the 63B50 waits on a
> keyboard pulse thru RX_data first to send /IRQ pulse to CPU RES6.5?
> I'm pretty sure the RES6.5 is necessary as I can witness this on my
> POLY800 without any midi,
> 
> Is that the correct process for the EX800 ?
> 
> Because I did hook up a controller keyboard to the EX800 and got no
> sounds from it even after manually programming a few, that's when
> replaced some IC's and finally swapped eproms and confirmed the
> KLM596 -7(EX800 & eprom(1)) was working fine in my Poly800. Then
> programmed 2 new EX800 #840206 eproms and still no sound and no
> RES6.5,
> 
> Tonight, I will put the Poly800 aside and concentrate on the EX800
> pulses,
> 
> I'm pretty sure its not the eprom but something has to give..
> 
> 
> 
> 
> 
>

> Well, I figured it out, the EX-800 eprom is actually working but
> slightly different that the Poly800 eprom.
> 
> I even installed poly800 keyboard in the EX800 and got my CPU
> RES6.5.. good to know!!
> 
> I'm certainly glad I figured it out on my own.
> 
> Have a good one
> 
>