Genesis/Megadrive Gentestv3.1 rom [Solved]

[Retro Mecano]

Hello,

recently i was playing around learning to exploit eprom programming fro various consoles.
i succeded in creating the 240p test suite on a MX27c4100 eprom over a sega genesis cart.

now i wanted to create the Gentest diagnostic tool for megadrive using the same ressources.
the size of the bin is 221kb. i found in the web that the tool AFS Rom suite can fill the missing byte with dummy values, to reach exactly 256kb. so i used that and double the size then byte swapped. unfortunatly it does'nt work. here is a comparaison between both roms of 240p and gentest using the same eprom and programmer:

MX27C4100 : 512kb
240p Test suite : 256Kb .bin (x2 and -> byte swap -> burn -> OK)
Gentestv3.1 : 221kb .bin (dummy filled with AFS Rom suite to 256kb -> x2 > byte swap -> burn -> Not OK)

tried without byte swap, filling dummy after doubling, etc.. without succes.
what could be wrong?

PS: my sega is PAL version Europe. could it be that Gentest is NTSC?

here are the original links :

24p test suite:
https://artemiourbina.itch.io/240p-test-suite/

Gentest:
https://mode5.net/gendiag.html

AFS Rom suite MD
https://www.romhacking.net/utilities/1621/

 

[Retro Mecano]

Problem solved.

I swaped the cart PCB. First one had sole Via damaged due to repeating soldering dissoldering.