In happier news I got the Commodore working! it's a CBM not a PET but afaik they're the same?
@tindall PETS for the European market were often re(branded) CBM due to a trademark dispute with Royal Dutch Phillips over the PET branding.
I think this must have happened in the early 1980s, as I /vaguely/ remember seeing both brandings here in the UK (about 32 years ago!)
@tindall I think the 8000 series (yours looks like one) might all have been branded CBM - especially 80 column capable display models which would be popular for business use..