cc65

C compiler and assembler toolchain for 6502 microprocessors

brewmacoslinux

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6502 C compiler

cc65ca65ld65cl65ar65da65od65

Compile a C source file to 6502 assembly$ cc65 -t apple2 program.c

Assemble and link a complete program for Commodore 64$ cl65 -t c64 -o program.prg program.c

Assemble an assembly file to object code$ ca65 -t apple2 boot.s -o boot.o