Zilog z80 to Motorola 6809 Transcode – Part 016 – Attract modes are done

Just a little update to say that I’ve made some great progress on the Pac Man code, it runs through both game attract modes properly and loops endlessly, looking for someone to put a quarter in the machine.

I found the random logic Pac Man uses actually points to the ROM hardware for part of the routine so I had to do the same in order to make the ghost movement match the original 100%.  The attract mode now matches real Pac Man and if someone know some patterns for Pac Man they should work on the CoCo 3 version exactly the same.

Getting the Maze demo working meant adding a lot of the ghost logic and once I add the controls in it shouldn’t be too much to actually get it to the point where I can play a level on the CoCo 3.


See you in the next post…

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