Bc2000 (for the BCF2000 & BCR2000)

Hi Royce !

Well, this is......erm.....interesting.....but, unfortunately, far away from 
what I can do ;o)

When I got my BCF (some time before it was released offically, actually), I 
opened the presets in an hex editor and managed to modify them by hand. I 
thought modifying the firmware was roughly the same, but it surely is not.

Nevermind, we'll just have to wait (and wait and wait and wait, I'm afraid) 
for Behringer to implement new things.

I would somehow almost bet the microcontroller is a PIC18F, the kind we use 
in midiBoxes (www.ucapps.de) but I do not want to open my unit. If I screw 
it, I can't buy another one for the moment (buying a house, basically ;op).

Cheers.
Jay.

rpcfender <rpcfender@...> a \ufffdcrit:

> Hi Jay
>> Has anybody here ever tried to decompile the firmware syx file to
>> study it ? Is it at least possible ?
> Yes, but...
> 1.  sysex works by having an 8bit header byte $F0 and ending with $F7
> and everything else in between is 7 bits (0 to $7F)
> So to send, say, 8 bit opcodes (programs) you need to pack the 8 bit
> into the 7 bits. There are a couple of ways to do this .
> You can divide the 8 bits into 2 4bit parts and send each of those as
> a 7 bit number. The 4 lower bits would usually be in the 4 lower bits
> of the sent byte but the upper nibble (4bits) could be placed
> anywhere in the 7 bits.
> Which comes first the lower nibble or the upper nibble?
> The micro controller could also be a 16bit chip which would make it
> even more interesting.
>
> A favorite of Emu systems is to have 7    8bit bytes lined up (imagine
> the bytes joined end to end so the binary ones and zeros are in a long
> line) and cut the binary number up into 7 bit bytes to send. This
> means you can send 7bytes of program in 8 bytes of MIDI, the quickest
> transmission possible.
>
> You need to find out the micro controller for the unit (strangely the
> BCR is one device I am yet to pull apart) and get the op code
> reference. Easy to do off the web. Then either take the code byte by
> byte and disassemble it or find a program to do this.
>
> Xavier took many hours to do this for the FCB1010, but the result was
> a much better coded unit with lots of extra functions.
> He was kind enough to give me a very early copy of his dissembled code
> so I could add the little bit of new functionality that I was
> interested in.
>
>>
>> There are so many things that could be added to the emulation modes
>> (among other things) that it would be smashing if someone could do
>> that.
> Absolutely, but it requires a very skilled person to donate a hell of
> a lot of time.
>
>>
>> Obviously, I cannot program, so I might not well realise how
>> difficult this might be........
>>
> The difficulty really lies in the time involved.
> The was some chat a while ago about someone trying to do it, but I'm
> not sure what has happened.
> It might have been Mark, but he has been so busy with the graphic
> editor that I haven't heard from him for a while.
>
> Feel free to dive in. Perhaps you could find out what the micro
> controller is and/or persuade Behringer to give you a copy of the
> circuit diagram. (Someone managed to do this with the FCB1010 and it
> made the re-coding much easier)
>
> All the best
> Royce