Probably you have the solution I need. 

At the moment the machine is at a friends place 

If I remember it right there's a JL Cooper midi interface in the machine and one or two OS Eproms but I don't remember which OS. I'll support you with some pictures soon.  I'll contact you by email a.s.a.p.

By the way do you have maybe also the Linn / Forat 9000 OS 7.09 Eproms

I'm a owner of a huge collection of all these old machines but some of them are not working anymore - especially also my two Linn 9000's and I found no one here in europe who's able to fix these two machines - and to send them to Forat LA is very expensive and complicated because of tax reasons. 

cheers,

ray