Apple II

The Apple II family is supported by cc65 through the two targets

• apple2 for Apple ][+ (or later) machines
• apple2enh for enhanced Apple //e (or later) machines
  • CPU (6502 vs. 65C02)
  • Text screen (only the latter can have 80 columns)
  • Lowercase chars (only the latter can display inverse lc)
  • Keyboard (only the latter has up/down keys)

• Save and restore the text video screen

The only publicly available information source on Apple GEOS internals is The Hitchhiker's Guide To GEOS. That information is for sure necessary but unfortunately not sufficient to actually create Apple GEOS applications. Therefore additional material is collected here.

• Apple GEOS symbol table
• Apple GEOS zeropage usage
• Apple GEOS file formats
• Apple GEOS CONVERT format