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Black Dragon Repair

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  • Black Dragon Repair

    Brad's Original Black Dragon (Tiger) PCB

    PCB was missing 2 roms a 27512 @ 9B and 27256 @ 2N

    The rom at 2N is for all the in game foreground text and 9B is part of the background.

    First things first replaced the 2 missing roms.

    Problem: Foreground text is all messed up.



    Fix. Pin 23 (A11) on rom 2N was stuck High. Tracked back to pin 2 of a 74ls253 @ 3N. Replacing the chip fixed the problem.

    Problem: Character Graphics have faint horizontal lines through them.



    Fix: Faulty 74ls253 @ 2K. Both chips were TI (Texas Instruments) branded IC's

    Board now 100%


  • #2
    w00t and thanks a bunch for fixing one of my favourite games! =)

    She looks very purdy now!

    Brad
    My Projects - Space Invaders Bartop, Williams A-Go-Go, Galaxian Bartop, Jukebox Kiosk 1&2, Jukebox Kiosk 3, Virtual Minipin, Generic Upright, MultiCab, Rampage,

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    • #3
      Had the pcb running for a few hours hasn't missed a beat

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