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Tetris Plus 2 Conversion

FPJ

FPJ

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I'm trying to convert a Jaleco Mega System 32 cart to Tetris Plus 2. I went over this thread https://www.arcade-projects.com/threads/jaleco-mega-system-32-cart-conversions.4745/ and my understanding is a ROM swap works as long as the board has the same custom chip. I have a board with the same custom chip, the problem I am running into is making sure I put the ROMs in the right place. Looking at the existing boards I have, I noticed the numbers on the Mask ROMs don't always match the silkscreened numbers on the board for the socket. For example, 09 is in socket 10, 10 is in socket 9 and 08 is in socket 4.

Does anyone have a picture of a decased Tetris Plus 2 cart I could see to go off of?
 
Tetris Plus 2 released on both the Mega System 32 platform AND as a stand-alone PCB.... so make sure you're using the MAME ROMs from the tp2m32 set

as as nem said... typically the the number after the . in the file name describes the location of the ROM and the text before the . represents the label on the chip.

if they're still not lining up then use the labels from your donor set to identify the position for Tetris Plus 2.

FPJ said:
my understanding is a ROM swap works as long as the board has the same custom chip. I have a board with the same custom chip
Click to expand...
This is true for straight ROM swaps. But I've since built a program to decrypt and re-encrypt the ROMs so ANY donor can be converted to ANY game. https://github.com/twistedsymphony/ms32_recrypt
 
Hammy said:
It should be possible to bypass the custom with a little board in the socket and just run decrypted....
It's on my to-do list... (along with blanks...)
Click to expand...
theoretically yes, but when I looked into this I quickly decided I couldn't be bothered to work out the pinout lol
 
In that original thread @Derick2k posted an archive of high res de-cased original cart pics and you can see the labels on the mask roms.

It's possible that there may still be some mistakes in MAME source regarding filenames. For example, I recently let them know about an issue with Gratia naming and it was fixed in a subsequent MAME release.

https://github.com/mamedev/mame/pull/13295
 
twistedsymphony said:
Tetris Plus 2 released on both the Mega System 32 platform AND as a stand-alone PCB.... so make sure you're using the MAME ROMs from the tp2m32 set

as as nem said... typically the the number after the . in the file name describes the location of the ROM and the text before the . represents the label on the chip.

if they're still not lining up then use the labels from your donor set to identify the position for Tetris Plus 2.


This is true for straight ROM swaps. But I've since built a program to decrypt and re-encrypt the ROMs so ANY donor can be converted to ANY game. https://github.com/twistedsymphony/ms32_recrypt
Click to expand...
Yeah. I made sure it was the MS32 version. Based off comparing the other boards to the MAME ROMs, it doesn't seem like they line up. For example, Game Tengoku has an MR94041.08 ROM but that board doesn't even have a socket in 8. But there is a MASK ROM labeled MR94041-08 in slot 4. Same board has the 9 and 10 locations swapped. The labeled ROMs (21 and 26-30) are exactly where you'd expect. My Tetris Plus 1 also has ROMs that don't match their spots. The TP2 rom set has a ROM 8 but none of the boards I've looked at have anything in that slot. That's why I was unsure about it otherwise I would have matched the slot to the ROM number.
20250707_171409.jpg


In the TP2 ROM set, I am seeing two that are 96019-01.9 and 96019-2.8. So those have both the dash number and the .X number. But the rest are things like tpm2m3203.10 or tpm2m3204.11. I think I'm just overthinking it. Or underthinking it. Lol. They're basically ROM 3 in slot 10 and ROM 4 in slot 11. The fact that there's something in slot 8 was what made me think I was reading things wrong because four of the other games I've seen don't use 8. I'll just add a socket there and plug everything into the slots labeled on the ROM files and see how it goes.

Thanks all!


kuze said:
In that original thread @Derick2k posted an archive of high res de-cased original cart pics and you can see the labels on the mask roms.

It's possible that there may still be some mistakes in MAME source regarding filenames. For example, I recently let them know about an issue with Gratia naming and it was fixed in a subsequent MAME release.

https://github.com/mamedev/mame/pull/13295
Click to expand...
I saw that, but sadly the Mega link no longer works. : /
 
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