piglet$ cat minus.pasm set N1, -2 print N1 piglet$ ./assemble.pl minus.pasm Error (1): No opcode set (tried set_n_ic, set_n) in <set N1, -2> This should probably work. Unfortunately, this involves more work on the assembler than I have knowledge of it so far. Leon ps test suite for inc coming up once this is fixed -- Leon Brocard.............................http://www.astray.com/ Nanoware...............................http://www.nanoware.org/ ... And he disappeared in a puff of logic