Actually, those are the binaries of the roms, not the source.
Aparently (I saw it on a forum, so how true it is, im not sure) the actual source code was floating around. So, if anyone has seen that...

--- In oberheim@yahoogroups.com , "gwpt" <geekon@...> wrote:
>
> Thanks! :)
>
> --- In oberheim@yahoogroups.com , Martin Ator <cyllall@> wrote:
> >
> > In the group files section Matrix Doc's/Oberheim Matrix-1000 EPROMS.rar
> >
> >
> > ________________________________
> > From: gwpt <geekon@>
> > To: oberheim@yahoogroups.com
> > Sent: Thursday, 12 April 2012, 3:04
> > Subject: [oberheim] Matrix 1000 Source code
> >
> >
> > Â  
> > Hi,
> > I saw a post on a forum where someone said the matrix 1000 source code was available.
> > Does anyone know if this is true is so, where could i find it
> > Thanks!
> > :) Guy
> >
>