[Usmar A. Padow] put together an Arduino Uno, SD card, four line character LCD, and PS/2 keyboard. but he’s also included alternative options to go without an LCD screen by using a computer ...

The gist of it is that [Matteo] hacked one function in the LiquidCrystal library to make ... to reliably reproduce. The LCD is unstable depending on how the Arduino board is reset.