Rockman X2 to Megan X2 direct conversion - Anyone done it?

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majorspawn
Posts: 20
Joined: Fri Aug 04, 2017 6:39 am

Rockman X2 to Megan X2 direct conversion - Anyone done it?

Post by majorspawn » Thu Nov 09, 2017 11:39 pm

Hi Gents,
I was wondering if anyone has successfully converted a RMX2 to a MMX2 cart by using 2 X 27c801's or 1 X 27c801 + 27c401? ( the game is 12Mbits)
The input on the on board chips is using a 8Mbit LH538LN4 and a 4Mbit LH534BN2. My understanding is that the pinout of the chips is the same as super FX
Image
So I followed that approach after successfully using it with Starfox 2. What I have attempted is splitting the rom using filesplitter to a 1MB and 512KB file, fixing the checksum, expanding the 512kb to 1M and writing to the 2 X 801s. I have wired as per the super FX pinout. Now I get the Capcom splash intro and the very beginning but then a black screen, the same behavior if I run the 1st part 1MB on an emulator only. Which sort of gives me an impression the second chips is not being addressed etc. I was originally going to use a 401 for the second chip to make it exactly 12Mbits but the 401 does not have an A19 on pin 1 so essentially I have no where to connect this line. Has anyone successfully got this working, if so could I please get some clarification on the best approach? Thanks in advance

rocklite
Posts: 13
Joined: Fri Dec 14, 2012 2:13 am

Re: Rockman X2 to Megan X2 direct conversion - Anyone done i

Post by rocklite » Mon May 28, 2018 10:50 am

Could not get it going that way personally. Could have been my poor wiring or board damage though... tried both a 512 and 1mb with and then without proper mirroring on the second half and couldnt get it going. Eventually figured out wiring for a 29f033c though.

megamanretro
Posts: 8
Joined: Sat May 05, 2018 9:00 am

Re: Rockman X2 to Megan X2 direct conversion - Anyone done i

Post by megamanretro » Tue Jul 24, 2018 9:23 pm

hi everyone , i've made a homemade copy of x2+x3 multicart using a 29L3211 (3.3v) and a new adapter that i've created only for using in a x2 donor.

Image

but for using this guy needs to edit hex o x2 ROM

works like a charm.

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