C0000000 00000003
3D40XXXX 614AXXXX
3D60YYYY 616BYYYY
916A0000 4E800020
lis r10,XXXX
ori r10,r10,XXXX
lis r11,YYYY
ori r11,r11,YYYY
stw r11,0(r10)
blr
XXXX XXXX = Address
YYYY YYYY = The value to be written to the address
Note: Only registers 8-12 are confirmed free.