Rick Dangerous for the CoCo 3
I finished a CoCo 3 version of the game Rick Dangerous For the TRS-80 Colour Computer 3, it requires 2 Megs of RAM and a 6309 CPU I originally planned to do a transcode from the Amiga version of the Continue reading
Glen's Weblog
Glen's little place on the net...
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CoCo DSK image utility for macOS
There seems to be a bunch of these programs for Windows computers but I don t know of any for macOS. With CODEX s help (ChatGPT’s coding assistant) I put together a tool that allows you to drag and drop files into Continue reading
BASIC compiler quick speed comparison
I was recently watching a video from Adrian s digital basement and he showed a BASIC program that drew a Mandelbrot on the text screen. The program was small and it also had a link to how fast the same program Continue reading
A little more 6809 optimizing
While working on my BASIC to 6809 Compiler, I ve been trying to optimize the code as much as possible. Nothing ground breaking here but I thought I d share this little trick I came up with for copying 8 bytes of Continue reading
CoCo BASIC to 6809 Compiler
I wrote a compiler for the TRS-80 Color Computer called BasTo6809 for a couple reasons. One is to learn exactly how to parse an expression using recursion and I thought it would be cool to have fast programs. The compiler Continue reading
CoCo 3 – Game Collision Detection Routine (6809 assembly)
I ve been recently toying with the idea of writing a game using the CoCo 3 256 x 200 x 16 colour resolution and I got far enough along to require collision detection of the game sprites. I wrote my own code Continue reading
Introducing Advanced Text Screen Scrolling Solutions for CoCo BASIC Programmers
Introducing Advanced Text Screen Scrolling Solutions for CoCo BASIC Programmers I m excited to present a versatile tool designed specifically for BASIC programmers working with the CoCo platform. This software facilitates efficient scrolling in both the conventional 32 16 text window and Continue reading
CoCo 3 – 256 x 200 x 16 colours is a great resolution
Since CoCo s don t have dedicated hardware sprites, I started writing my own library to handle this task. So in the future I won t have to re-write this code again and again. I recently started reverse engineering the Amiga version of Continue reading
CoCo 3 Memory Test
I upgraded my CoCo 3 with a 2 Meg upgrade kit from Cloud9 that I picked up at CoCoFest this year. Mark Marlette makes fantastic hardware for the CoCo 3 and has been doing it forever. If you want great Continue reading
MOS 6502 to Motorola 6809 Assembly Language Transcoding
I ve started looking at some MOS 6502 assembly code and I m in the process of transcoding it to Motorola 6809 assembly. I ve found an excellent PDF online describing the process of translating programs from the 6502 to the 6809 starting Continue reading