ophis: ophis (cross assembler for 6502) ophis: ophis: Ophis is a cross-assembler for the 65xx series of chips. It supports ophis: the stock 6502 opcodes, the 65c02 extensions, experimental support ophis: for the 4502/4510 used in the Commodore 65 prototypes, and syntax ophis: for the "undocumented opcodes" in the 6510 chip used on the Commodore ophis: 64 (syntax for these opcodes matches those given in the VICE team's ophis: documentation). ophis: ophis: Ophis is written in pure Python and should be highly portable. ophis: