SRAM Expansion

so you already made it work?

maybe it's not much useful, but here's some line of random conversation among me and Everything about SRAM expansion:
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In an FF3 cartridge, the SRAM chip is only 8192 bytes (from $30/6000 to $30/7FFF) but in other game cartridges 
the SRAM can be larger.

Emulators and ROMs don't have hardware limitations like cartridges though. If you wanted to enlarge the SRAM 
for a ROM I believe it would be as simple as adjusting the ROM header byte at $C0/FFD8. The value for the 
original FF3 ROM is $03, which indicates a 64K Bit SRAM (8192 bytes). If you change this value to $05, the 
emulator should automatically increase the SRAM size to 256K Bit. According to the SNES Dev Manual, the 
additional SRAM will be available from $31/6000 to $31/7FFF, $32/6000 to $32/7FFF, and $33/6000 to $33/7FFF.

You can read and write SRAM any time you want. Check out the way the game does it at C3/151D (save game) 
and C3/1566 (load game).
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PS: i don't even remember how we ended up talking about SRAM expansion...