I’ve been doing a lot of digging lately & ive come across an official Trials of mana ROM that’s been successfully dumped from the Nintendo Switch Mana collection which includes ‘seiken densetsu 3’ official English translation!!!
Now the original SD3 Rom was 32Mb in size, this new official translation is a whopping 48Mb & there have been a few people who have successfully translated their own carts with either 2 TSOP chips or 1!!
The 2 TSOP40 chip sandwich method in my eyes looks to be fine as they’re both 5v and only needs a couple of extra wires to the Mad-1 decoder, but the 1 chip method which is preferable as no rewiring and is less damaging to the original pcb - theirs not a lot of info on, especially as the 64Mb (4 x 16) TSOP48 chips being used are max 3.6v so suspect level shifting going on but can’t really see any on the piccy. I’ve tried asking the guy that did it over @ ultimate-consoles.fr but he’s keeping shtumn!!!

1 chip method - https://twitter.com/redfromnec/status/1 ... 68161?s=12
2 chip method - https://www.reddit.com/r/reprogames/com ... =post_body
I’ve been speaking to the guys @ BUYICNOW and they’re quite happy to design a similar TSOP48 to snes 36 mask Rom adapter so waiting to here back about this.
I’m wondering if anybody has tackled the larger Rom sizes (above 32Mb) excluding Star ocean as thats SDD-1 & what their methods are?

Anyhow thanks for humouring me!
All the best
Tom