I GOT IT
MY PROBLEM IS RESOLVED!!!
IT WORKED THANK YOU

@dankcushions no I wouldn’t ask you to and thank you it’s really helping me and I promise no more questions (for tonight at least)

@nterry65 best converter if you need bin/cue : https://github.com/libretro/FBNeo/tree/master/src/burner/libretro#neogeo-cd-doesnt-work-why-

I already have all the required BIOS files. I just wasn't aware of the 32x-CD bring implemented yet as I couldn't find any definitive information.

After further reading I'm almost definite that it's down to the Sandisk Ultra card not being fast enough for cd games. I only have 50 roms in each format at the moment and three in mega cd , so it's not a space issue.

Would a SanDisk Extreme SD card be up to the job, or are there other SD cards anyone would recommend?

Thanks.

@Darix i would try sega cue maker. .ccd should work with it. Not sure about the other two. You can also try renaming it to .bin then running sega cue maker if it doesnt work the other way. Yes i know its a different format but i have gotten several games to work that way in the past.

Nice work! I do love the look of the first generation Megadrive. Can you show some more details or close ups (if you have them) on how you wired up the original power switch. Did you cut the section of the original motherboard that had the switch on it away or did you de-solder the switch (or even just got with a new switch altogether)? As you know from my thread I'm planning on doing something similar with a MegaDrive 2.