Korg Poly800/EX800 Users

I just replaced my Poly800 ROM with a 27256
containing an EX800 ROM (set A14 and A13 to ground).

Notes and Sysex works, but program change messages (0x0c)
do not get recognized.

Param 87 can be set from 0 to 64.

Any idea what is wrong? New format for program change messages?

EX-800 Parameters are swapped:

Param 86: Enable Program Change
Param 87: Midi Channel

parameter 87 sets the pitch bend depth on the EX800. I used a 27256
and burned both roms inthere so I can easily swap the keyboard
functionality with a switch on the address lines

--- In korgpolyex@yahoogroups.com, "paranoyaxc" <keuchel@r...> wrote:
> I just replaced my Poly800 ROM with a 27256
> containing an EX800 ROM (set A14 and A13 to ground).
>
> Notes and Sysex works, but program change messages (0x0c)
> do not get recognized.
>
> Param 87 can be set from 0 to 64.
>
> Any idea what is wrong? New format for program change messages?