Part 4: HCD65 [coming soon]
Part 5: Commodore 6502 ASM [coming soon]
History
Cross-Assembler”, available for various mainframes and minicomputers, and the “
Resident Assembler”, running on natively on 6502 systems.
According to the master’s thesis A Cross-Assembler/Simulator for a Microprocessor-Based Industrial Controller, the original MOS Cross-Assembler, together with a simulator, was implemented by the student Robert E. Blanton at the University of Illinois at Urbana-Champaign.
It was written in FORTRAN and used a 6-bit (i.e. all uppercase) character encoding. On the university’s CDC Cyber 175 system, it required 120K (!) 60-bit words of memory to run and had “generally acceptable” response times.