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Bally Alpha Game Maker HD

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keystone9:
I have a Bally Game Maker HD I am shopping out and on the CPU where the bios chip belongs there is a chip marked "AVBBPRO0R021-02"
and I am not familiar with this chip number. Doe's any one know what this chip is? Thanks. Bill.

rickhunter:
My gamemaker came with that bios as well.   The OS that it used was AVOS00000323-04.  I just replaced the bios to use the newer 336 os.  Some of my gamemaker suites don't work with the older bios.

keystone9:
Yes my OS is 323-04 also. So I'm guessing that to upgrade my board which is a PCA394556-4-0 and MPU which is a 203604-00002 I will need a 336 OS, a 335 clear and a AVBBP26S1GHZ-03 bios. Another question is do I need a Game Maker 336 Bios? Thanks. Bill.

rickhunter:
I'm not clear on your question, there is only 1 bios on the board.  The AVBBP26S1GHZ-03 bios is what I"m using right on on my gamemaker HD cabinet along with the 336 OS and the 335 clear.  Works with all my gamemaker Suites.

keystone9:
What confused me is that the 323-04 OS card says Game Maker printed on it. Do I need a 336 OS that says or is printed Game Maker for everything to work? Thanks. Bill.

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