1) Map pins from MX ROM chip to AMD Flash chip..
2) Figure out what to do with address line going to Rumble feature.. leave battery out? make switch between extra rom / rumble??' Actually, looking at my cart, it looks like I'll only be using AA13+14, leavingg 15+16 unused and rumble feature intact :]
3) Adding RAM
this will be the easiest part.. practically a drop-in!! :D
For my SNES Gear...
ATMEGA LPT->USB
1) Create Prototype on perf board / PCB breadboard....
2) Test in WINDOWS.. figure out flashing of ATMEGA..
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