"This is the source code for Super Quartet on the Philips-CDI. To compile it, you need the OS9 C compiler as well as some more tools that you need to put in the img folder inside of src. You can find these at https://gameblabla.nl/files/cdi/ This will only fully compile on Windows 32-bits, due to an error in the C compiler that requests a unix path on Windows. This won't work on Dosbox for example (even though it can run the binaries) but /dd/ will default to C: on Windows. This corner case also still won't work on ReactOS. The source code is based on Frog Feast's source code, which without it, this project wouldn't be possible. Make sure to also have make.exe and to set the environment variable to C:/OS9C/bin. I couldn't figure out why the sound effects won't work completely so the related code is completely removed. I might put it back some later time though."
Find it here: https://github.com/gameblabla/superquartet-cdi