I am trying to change the language in a Lost World Jurassic Park (Sega/Stern Whitestar) and understand that the ROMs need to be changed. I have downloaded the ROM package from IPDB and when unzipped have the files:

Jp2_u7.bin
Jp2_u17.bin
Jp2_u21.bin
JP2CPU.202
JP2DSPA.201

I believe that I only have to update the CPU and Display ROMS (?) and have removed the CPU (U210) and Display (U12) ROMs, which are 27C040 chips.

I burned and verified the JP2CPU.202 and JP2DSPA.201 files onto 27C4001 chips as ROM files, not BIN. My understanding is that 27C040 and 27C4001 chips are interchangeable and the same ones worked in my Demolition Man. I installed the two chips back in the boards in the correct orientation but now all the pin does is blink the GI on/off. No sounds, display, or anything.

Edit: I set the DIP switches for USA before installing the updated CPU & DSP ROMS.

Do I also need to update the ROMs for u7, u17, and u21?

Help?

Yes, thank you. I should have mentioned that I set the DIP switches before I installed the ROMs.

Thank you for the input everyone. Am I correct that I should be burning the JP2CPU.202 and JP2DSPA.201 as ROM files and not BIN?

Not sure if you're serious about this but I have never heard about this sort of operation before.

UPDATE - I have english after burning the JP2DSPA.201 file as a BIN. Initially the display was blank but after re-seating the ribbon cables it came to life. I'll clean all those pins and probably replace the ribbon cables for the long term.

The game came with CPU v1.02 and the DIP switches appear to change what country it boots as. I have had no luck yet burning the JP2CPU.202 file to either a 27C040 (stock) or 27C4001, the game only blinks the GI after power up.