View Full Version : Black Dragon Repair

Arcade King
13th May 2009, 02:37 PM
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%


13th May 2009, 02:52 PM
w00t and thanks a bunch for fixing one of my favourite games! =)

She looks very purdy now!


Arcade King
13th May 2009, 02:53 PM
Had the pcb running for a few hours hasn't missed a beat :)