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cc65 - a freeware C compiler for 6502 based systems
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include Added explicit settings of calling conventions in pointer-to-function declarations in system and library headers. 2015-06-22 00:15:48 -04:00
libsrc Added _directerrno() to the sim6502/sim65c02 libraries. 2015-07-18 18:23:08 -04:00
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cc65 is a complete cross development package for 65(C)02 systems, including a powerful macro assembler, a C compiler, linker, librarian and several other tools.

cc65 has C and runtime library support for many of the old 6502 machines, including

  • the following Commodore machines:
    • VIC20
    • C16/C116 and Plus/4
    • C64
    • C128
    • CBM 510 (aka P500)
    • the 600/700 family
    • newer PET machines (not 2001).
  • the Apple ][+ and successors.
  • the Atari 8 bit machines.
  • the Atari 5200 console.
  • GEOS for the C64, C128 and Apple //e.
  • the Nintendo Entertainment System (NES) console.
  • the Supervision console.
  • the Oric Atmos.
  • the Lynx console.
  • the Ohio Scientific Challenger 1P

The libraries are fairly portable, so creating a version for other 6502s shouldn't be too much work.