The author discusses their solution for adding a screen to their KIM-1 single-board computer. They describe a sidecar screen that is portable, powered by the computer’s built-in power supply, and can be driven by the computer’s unallocated I/O lines. The screen they chose is a 20×4 character backlit LCD panel that can be controlled via a serial link. The author shares their process of creating a driver for the LCD screen and mounting it in the KIM-1’s briefcase. They also mention using a programmable character set to create a title screen. Overall, the author provides detailed information about their solution for adding a screen to their computer.
http://oldvcr.blogspot.com/2023/10/what-kim-1-really-needs-is-lcd-screen.html