snes9x - Write to specific memory address

snes9x - Write to specific memory address

I know that memory.writebyte in lua for the snes9x will write to ram from
0x7e0000 to 0x7fffff but how do you write bytes at the assembly level of
these games? Like if I already know what byte to write at a certain
address like (0x00966E, ox7F)??? I know that memory.writebyte won't work
because it doesn't access the assembly level of the memory that I'm trying
to get to...