#ZX81

* http://www.scribd.com/doc/56780765/ZX81Assembly
* http://www.users.waitrose.com/~thunor/mmcoyzx81/index.html
* http://www.worldofspectrum.org/ZX81BasicProgramming/
* http://www.larwe.com/museum/download/ts1000_instructions_lowres.pdf
* http://www.zx81kit.com/online_zx81_manual.htm
* http://zx81stuff.org.uk
* http://www.zx81museum.net


