Korg Poly800/EX800 Users

Does your boot up show B19F26? If that is what you see when you start
up your HAWK while holding down the bank hold button, then you don't
have the latest boot code.
If you hold down the bank hold button and power up with boot code
version 1.98, 1.99 and 2.00, you will see "B x. xx" followed by "F x.
xx". 
You must have version 1.98 or higher before you can upgrade to v2.66.
You can downgrade to v2.65 to recover your synth. And if that version
does not work. You can downgrade even further.
But if you absolutely sure that you want to get to version 2.66 then
you will need to upgrade your boot rom.
Unless I got something wrong. So let us know if you actually see
"B19F26"?
/Mike
On Wed, 2019-03-13 at 16:41 +0000, damaandrea1@... [korgpolyex]
wrote:

> Software Version B19F26
> 
>

Error 1 means you are sending invalid MIDI to the HAWK. Check your MIDI
set up is not sending other MIDI and make sure there are no MIDI loops.
Boot version 1.5 was written for version 2.53. But it was able to run
on 2.55. I don't think it will go any further than that.
So you might actually be better off upgrading your boot ROM to the
latest boot code./MikeOn Wed, 2019-03-13 at 19:45 +0000, damaandrea1@... [korgpolyex]
wrote:

> I've tried to downgrade to v2.65l and to 2.59a but is not working,
> error 1 appears
> 
>

The ability to flash into your Poly either boot code or the software
itself should work as long as your Poly can get into FLASH mode.
If you want to get to version 2.65, you MUST have boot code version
1.98, 1.99 or 2.00.
If you try to run 2.65 on boot code that is below 1.98, it will NOT
work.
Upgrading the boot code requires sending the boot code to the synth in
FLASH mode and then swapping the boot rom with the flash rom next to
it.
If you don't swap the chips, then the boot software is NOT upgraded.
See https://sourceforge.net/p/hawk800/discussion/software/thread/383396
e6/#f458
/MikeOn Wed, 2019-03-13 at 22:19 +0000, damaandrea1@... [korgpolyex]
wrote:

> It seems there is no way to update the boot code at the moment. Since
> I've tried to downgrade the software the synth is not able to receive
> Midi anymore. Setup is still the same, was working before and not
> working now. 
> 
> You think is necessary for me to upgrade the boot ROM on the Hawk 800
> or would be the code enough? 
> 
> I'm new to this and I've recently got my first Poly800 so any help is
> really appreciated.
> 
> Thank you in advance
>

One last thing...
Be very, very careful when you do the boot code upgrade. You don't want
to brick your Poly! Then you have to get a boot ROM from me. Less
playing time - is not good!
/MikeOn Wed, 2019-03-13 at 23:01 +0000, damaandrea1@... [korgpolyex]
wrote:

> Ok I got it! Thanks for your help, I will update you on the result.
> 
>