@ Castellen
I'm at Irc with our #1 coder at that time. there were 2 assemblers we used.
- Dasm (by Matt Dillon)
- Frankenstein (multi target assembler.. Can't remember author)
Try
this for Frankenstein and
this for dasm.
Can't quarantee those are latest versions, though.
(EDIT)
Of course those both are on Aminet too.. :-D