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Monthly Archives: January 2018
Defender Conversion for the CoCo 3 – Part 5 – Another cool 6809 coding trick they used
Hello, I just wanted to document this neat little trick here. For changing the colour of one of the 16 stars on screen randomly in Defender they do the following: * Table of stars @ $AF9D to $AFDC * Format … Continue reading
Posted in CoCo Programming
Tagged 6809, CoCo 3, Defender Conversion, Motorola 6809, Tandy Color Computer
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Defender Conversion for the CoCo 3 – Part 4 – Two out of Three Attract Screens are converted
I’ve been working hard on the Defender conversion and am happy with the progress and how well things are going. I uploaded a video on YouTube showing that I now have two out of three attract screens working. The code … Continue reading
Posted in CoCo Programming, Emulation
Tagged Arcade, CoCo 3, Color Computer, Conversion, Defender, Emulated, Tandy, TRS80
3 Comments
Arcade Machine Conversion to the CoCo Overview
Hello, in a recent post I got a comment from username Perezernestoj who asked if I could convert Super Pac Man as my next game for the CoCo after I complete Defender. I explained how much work this is and … Continue reading
Posted in CoCo Programming
1 Comment
Defender Conversion for the CoCo 3 – Part 3 – Two more 6809 coding tricks they used
Below are a couple of coding tricks I’ve learned from Defender this week. I thought I’d pass along the tricks for others to use, if they aren’t already. For simple loop counting, a nice fast way is to load an … Continue reading
Posted in CoCo Programming
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Defender Conversion for the CoCo 3 – Part 2 – Short and Sweet
Just a little blog entry to share a neat little bit of 6809 code. I’m really impressed with how well the 6809 is programmed in Defender. I was decoding some of the Defender source code today and I came across … Continue reading
Posted in CoCo Programming
8 Comments
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