Changing chips on M92 B-boards?

ave · Post by **ave** » Mon Dec 28, 2009 8:48 pm

Is it possible to change the eproms of games that run in combination the M92 motherboard? To change regions for instance.

PC Engine Fan X! · Post by **PC Engine Fan X!** » Mon Dec 28, 2009 9:02 pm

This thread would most likely belong in the hardware section, right?

I've always wondered about this as well. Irem's Ninja Baseball Batman PCB a M-92 PCB.

PC Engine Fan X! ^_~

ave · Post by **ave** » Mon Dec 28, 2009 9:15 pm

Yeah, you're probably right >_<
So, if some moderator can be arsed to clean up the mess I've created and get this thread over to the hw section, I'd be grateful ^_^

robivy64 · Post by **robivy64** » Mon Dec 28, 2009 9:41 pm

Nope. Each B board is unique to the individual game it was designed for. I've tested this trying to convert In The Hunt to R-Type Leo. In my experiences, I was never able to get the game's sound to work properly. After reviewing an original R-Type, I noticed that one custom sound decryption IC was a different part number than the one found on ITH, despite them having the same exact PCB layout.

You can swap out the entire B board for another. The A board is purely for CPU, Audio hardware, and some graphics.

ave · Post by **ave** » Tue Dec 29, 2009 1:26 am

Actually I wanted to know if I could change the B board's EPROMs (if socketed). To turn i.e. a World version of Undercover Cops into a Japanese one.

Post by **system11** » Tue Dec 29, 2009 1:44 am

It's very likely you can re-region them.

THE · Post by **THE** » Tue Dec 29, 2009 10:36 am

If you compare in Mame ROM_START( uccops ) with ROM_START( uccopsj ) you will see, that all CRC/SHA1 are different between both versions, it looks like changing the region is pain in the ass in this case as you would need to change 15 Roms

...

Post by **system11** » Tue Dec 29, 2009 11:45 am

Yeah you're right, interestingly there's another version too - 'Alpha Renewal Version' - which is listed as an entire set, but matches the Japanese set except for just two ROMs. Someone should probably point that out to them.

Looks like you can swap US/World easily enough though.

Moonwalker · Post by **Moonwalker** » Sun Mar 20, 2016 11:37 am

Sorry to revive the old thread, but I got myself an us verison of Undercover Cops and would like to swap it to alpha or japenese version. Is it possible and could somebody help me out please with instructions how to do it?

Thanks an advance.

shmups.system11.org

Changing chips on M92 B-boards?

Changing chips on M92 B-boards?

Re: Changing ROM's possible on M92?

Re: Changing chips on M92 B-boards?

Re: Changing chips on M92 B-boards?

Re: Changing chips on M92 B-boards?

Re: Changing chips on M92 B-boards?

Re: Changing chips on M92 B-boards?

Re: Changing chips on M92 B-boards?

Re: Changing chips on M92 B-boards?