Calculators

HP-21

An emulator for a standard scientific calculator



HP-29

An emulator for a HP-29 programmable calculator



HP-65

A microcode emulator for the first ever pocket programmable calculator



HP-67

A javascript emulator for the HP-67 card programmable calculator



HP-67u

A microcode emulator for the HP-67 card programmable calculator



Secrets of the HP-65

What does your calculator really think?



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CP/M Programs for Windows

CP/M Mastermind

Which are the right letters and which are in the right spots?



CP/M PNum

Print a file with line numbers.



CP/M Pressup

Be the first to press down their pegs.



CP/M TTT

Tic Tac Toe.



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Emulators to run the original programs

Run CDOS

A one-click computer running CDOS 02.36 from long ago ...



Run CP/M

A one-click computer running CP/M 2.2 from long ago ...



Run Cromix

A multi-user, multi-tasking operating system on a Z80, on Windows!



Z80 Emulator

Run CP/M Z80 programs in a web browser!



Z80 Simulator

Run a Z80 based system on your desktop.



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Other Programs

Notepad

Simple notes on the go



Puzzle

Move the pieces to get the picture



Scribble

Freehand sketches on the go



Timer

A basic countdown timer



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handheld computing

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