SNES ROM utility?
I know of a program named Swapbin by the The Dumper on the late CherryROMs forum. It swapped a couple address lines, is that what you want?
I'm not sure which address lines to swap but this is the idea on A12 and A13:
Code:
for (i = 0; i < romsize; i++)
{
a12 = (i >> 12) & 1;
a13 = (i >> 13) & 1;
//swap
a12 ^= a13;
a13 ^= a12;
a12 ^= a13;
a = (i & (1 << 12)) | (a12 << 12);
a = (i & (1 << 13)) | (a13 << 13);
out[a] = in[i];
}