Korg Poly800/EX800 Users

Hi there,
The CPU won't get any RES6.5 interrupts unless MIDI bytes are being
received. And unless you're sending a large number of MIDI messages,
you probably won't see the interrupts on your oscilloscope and
definitely not on a logic probe.
The differences are minor. The board you're using is perfectly OK in an
EX-800. The circuit diagram is identical between Poly-800 and EX-800.
The only difference in the code between the ROM's is that the Poly has
keyboard scanning routines and EX-800 does not. And the EX-800 has
sysex functions and the Poly-800 does not.
/MikeOn Sat, 2019-06-08 at 19:27 +0000, studio_1a@... [korgpolyex]
wrote:
> 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?
> 
>