This is a small, Arduino-based Tape replacement for your Kosmos CP1.

It reads and writes ".bin" files that are compatible with my Kosmos CP1 emulator, so you can can develop with the ease of a modern computer and run it on the real thing :-)

Also, you can use the Kosmos Tape Tool to transform your old audio cassettes to digital files while there still is hardware to do this.

Hardware requirements are minimal. To build it, you need

• an Arduino. Pretty much any version will do, as long as it provides +5V.
• 4 momentary push buttons
• an microSD shield (ideally with a built-in voltage converter)
• an HD44780 compatible LCD display without I2C backpack. 16x2 will do

You can build it on a breadboard, if you want, but of course a perfboard is more permanent; please let me know if you want to build a real custom PCB, I will be very interested in that :-)

There are a few Fritzing files in the schematics directory, and the code contains comments on what to connect how.

There's also an OpenSCAD file included for a 3D-printable enclosure. It is somewhat ugly, but it works for me :-) Of course, you will have to adapt it if you're using different buttons.