The ZXPS Arduino Libraries
The ZX Printer Shield project has two Repositories: ZXPrinterLibrary and ZXPrinterTest located at https://github.com/ohnosec
The proceedure for downloading them and the required digitalwritefast library into you Arduino IDE are here.
The ZXPrinterLibrary is very well commented and includes 5 examples sketches. Together they serve as the documentation on using the ZXPS.
The images below are a preview of what you will find when you install the libraries in your Arduino IDE.
x
Above - A screenshot of the Github repositiories
Above: The ZXPrinterLibrary folder structure
Above: The ZXPrinterTester folder structure