hello ok, i'll have a look at bruce tomlin's assembler then. it seems to be buggy (some problems with register accesses via ISAR), but i must have a closer look at that first. personally i'd prefer bruce's assembler or any other solution where source code is available, so that it can be compiled for any platform. i don't like being dependant on an old shareware dos program. cheers thomas >they do, and so this is pretty possible... I began working on an F8 >TASM table file, but didn't get very far before I had to leave to go >out of town for the weekend. I'll pick back up on that soon.