PEEKO COMPUTER

Learn 6502-ish assembly programming with an 8-bit toy computer in your browser. You know - for kids! Type bytes into memory or use the assembler, run your program and see what happens to the machine's memory. Follow the challenges for a guided introduction to the instructions you'll need to use.

It's a re-imagining of Acornsoft's 1982 Peeko-Computer — a teaching tool I first came across on a BBC Micro at school. I've added an assembler so you don't have to type opcodes in hex (unless you want to). Share your programs via a link. All state is local - no cookies, no backend.

14 challenges that teach the instructions you need to write real programs.

EXAMPLE PROGRAMS

• COUNTcounts down from FF to 00
• ADDadds two bytes; captures the carry-out
• PRIMESfinds the first prime number above a seed
• SIEVESieve of Eratosthenes prime generation