A simple text based Tetris clone written in 6809 assembler for the Tandy Color Computer. This is meant to be just a little fun learning project to teach myself 6809 assembler for the computer of my childhood.

Largely based on this excellent tutorial from Javidx9 on how to write a text mode Tetris clone in C++ for Windows:

• https://www.youtube.com/watch?v=8OK8_tHeCIA

• https://github.com/OneLoneCoder/videos/blob/master/OneLoneCoder_Tetris.cpp

It uses the CoCo ROM subroutines to generate pseudo random numbers and to poll the keyboard.