I did some routine updates and releases today. I released Pong v0.99 beta for Doors CS (it's only missing a readme). Scoring, high scores, raygun, powerups, etc are all complete and working. If you find any bugs, feel free to email me. You can find Pong v0.99 beta here
The other thing I released today was a set of routines for communication between z80 calculators and PS/2 devices (i.e. keyboards and mice). This is something I have been working on for quite some time, and I will soon make these into SEs for Doors CS v5.0 that allow you to use a keyboard or mouse to control the shell. There are also some optimizations that I would still like to make on it.