Genesis/Megdrive repro help needed

Im trying to make vixen 357 and Using F1 as donor which have sram and are 1mb same as vixen 357.

Im Using an 27C160 Eprom.
All i get is the licensed by seg logo and after that red screen.
The checksum is good before i byte swap it. Any help is velcome

An

 

try another another dump of the rom.

 

If the rom wasn't byteswapped (aka correct endian) you would not get past the TMSS screen. I suggest you try the rom you burnt on a battery less board to check if it function.