Arcade Otaku - アーケード オタク

I bought this game some months ago , but the lack of TATE cabinet didn't let me play it ...

Game starts normally , credit OK but if I touch TEST or any action buttons , the game gets freeze.


What could be the problem?

I tried 2 CPS Base boards ,same result .
And those base boards works perfect with other games ...

The issue is on the B board, where the code EPROMs are. Try carefully reseating them as a first thing. Be warned that the C board has a suicide battery. You don't want to fiddle with it.

Asayuki wrote:The issue is on the B board, where the code EPROMs are. Try carefully reseating them as a first thing. Be warned that the C board has a suicide battery. You don't want to fiddle with it.

Do you mean pressing stronger eprom to socket with my fingers ?


Thanks for your help

Reseating means pulling them off and putting them back in.

Is there a chance of it suiciding if the program roms are removed?

nem wrote:Is there a chance of it suiciding if the program roms are removed?

AFAIK the battery is only connected to the big QFP chip on the bottom of the C board. Hands off that thing.
However, Leonard is the real CPS expert; please correct me if I'm wrong, pal.

Asayuki wrote:The issue is on the B board, where the code EPROMs are. Try carefully reseating them as a first thing. Be warned that the C board has a suicide battery. You don't want to fiddle with it.

Thanks for the hint , do I need to take off the bigger EPROMs and re-install all again ?

Yes,
see this page, line 5527:
https://git.redump.net/mame/tree/src/ma ... s/cps1.cpp
The names of the files will make you understand which are the ROMs to unplug and replug. Be careful not to bend any pin.

Mercs has no battery on the C board. You want to check 11F, 12F 11H and 12H eproms. They are in a cluster of 4 in the corner below the C board.