If it helps, my Flatmap64 carts support 64 megabits of flat memory (no bankswitching!). They work on real hardware and the ROMs also work on Blastem! emulator (and most likely also others like Genesis Plus GX). They allow breaking the 32 megabit barrier by using a trick to move the SegaCD mapping when the CPU is accessing the upper 32 megabits, to avoid collisions.
And the cart and programmer are open source software and hardware.
Awesome! Works great on the emulator and it's an impressive project. Unfortunately I tried burning the ROM on one of my Flatmap64 cartridges, and it does not work. As the cart does not have SRAM, it fails the SRAM check and freezes on that check screen.
Could it be possible to support flash saving, or at least if SRAM does not work, just continue with save support disabled?
Thanks a lot for the great effort on this port, awesome work!
EDIT: BTW, I have made both the cart and the flash saving library, so if you are interested in supporting flash save and need help, I'll be glad to help.
