Source Code for this 8563 Demonstration You can find the below source code at https://github.com/stringsn88keys/unnecessary-computer-things/blob/main/episodes/2021/001/commodore-128/CHASXYCOSINE.BAS and watch here for demonstration of the run time vs. the TRS-80 Model 16 emulator (a computer for which I never realized had a graphics mode when I had access to one). The BASIC and disassembly is also available on…