1. Atari tools

  To assemble atari tools you have to use MADASS:
    mads: http://mads.atari8.info/

  To compile mads you should use Free Pascal Compiler:
    fpc: http://www.freepascal.org/

2. AVR binary

  To compile AVR binary you need standard avr-libc and avr-gcc:
    avr-libc: http://www.nongnu.org/avr-libc/
    avr-gcc: http://gcc.gnu.org/

