- Assembler  http://school.anhb.uwa.edu.au/personalpages/kwessen/apple1/Krusader.htm
 - BASIC  http://www.themotionstore.com/leeedavison/6502/ehbasic/index.html
 - Pascal  http://pascal.hansotten.com/
 - DOS  http://www.z80.eu/dos65.html