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Mark McDougall
Works at Virtual Logic Pty Ltd
Lives in Sydney, Australia
31 followers|119,540 views
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Mark McDougall

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Gameplay starts at 5:35 in a 7:06 video. Meh!
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Lost by a nose? 

Mark McDougall

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You didn't add the bin directory to your PATH, you added the SGDK directory!
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Mark McDougall

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You missed a great port on the TRS-80 Coco / Dragon computer!
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Mark McDougall

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Ours started doing it last night too!
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Mark McDougall

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Those CPLDs are doing all the address decoding for the ROM chips for the various games. It would be interesting to know if they've set the security bit in the programming; if not you could find the JTAG connector on the PCB and read the contents out again.
In theory with the CPLD's you could use ROM chips with different faults on different boards to lock out different regions - but you would require a unique CPLD program for each PCB. I suspect they try to place chips with the same fault in the same position on every PCB to minimise the different CPLD configurations required.
Those shorted pins look like they're next to the power pins on those devices.
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Mark McDougall

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I'm curious about the origin of the "Dick Smith Invaders" game. You say it was programmed by contractors for Dick Smith, but it is clearly a port of "Tandy Invaders". Or vice-versa. Any further info on that?
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I doubt that Dick had any part in the transaction... we was too busy trying to clone vegemite!
People
Have him in circles
31 people
Andrew Jens's profile photo
maryanne poulos's profile photo
David Boscolo's profile photo
David Beazley's profile photo
Mario S. Boscolo's profile photo
George Janczuk's profile photo
GadgetUK164's profile photo
Sibila Espinosa's profile photo
Ben Nairn's profile photo
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Currently
Sydney, Australia
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Occupation
Electronics Design and Computer Software Engineer
Employment
  • Virtual Logic Pty Ltd
    present
    Director, Engineer
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Male
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