Breaking the Konami M2 security routine and bios swapping for a "universal" board

[awbacon1]

Since I've gotten a lot of messages here and elsewhere about Konami M2 boards and which one someone should buy / how to convert them, etc etc, I made this. Hope it helps anyone who owns the hardware or wants to get into collecting for it.

Gotta love Konami for printing the "key" on the front of the discs lolol

 

[twistedsymphony]

Interesting, I never knew the original PolyStars boards had less RAM.

Until we get the games patched for the alternate bios another hack we could do is run a 27c322 BIOS chip with both BIOSs installed and a switch on A20 to swap between them.

That way you could have a stack of discs with the correct code and then just flip the switch to select the appropriate bios whenever you need.

I have some time off around the holiday so I'm hoping I can poke at this a bit in the coming week.

 

[awbacon1]

Yeah its a bummer. I am sure you could add extra ram though