Although this is a bootleg it follows the original PCB closely.
Couple of easy fixes on this one.
First a character issue and second a sound issue.
As you can see in the video above, the screen is filled with “A”s and none of the text is correct
There is a seperate EPROM used for characters on this game.
Pulling this and reading back with my programmer yielded a valid dump for Black Tiger.
Checking the adjacent associated 74LS273’s and 74LS245 showed I had at least one pin floating.
I traced this back to a nearby TMM2016 which had D7 floating.
Replacing this fixed the screen
The sound issue was even easier. The sound program EPROM was completely smashed. Replacing it fixed the issue.