modding X360 help

i have 3 problems/questions… when doing the command dosflash r ____(i can’t get the right port) 1 a0 1 4 _(A or C or?):\orig.bin _ (does it end with 1 or 0? i’m have an Nvidia chipset.)
so can someone help with the port?.. ive tried quite a few… including these 2 FFE0 and FFEF

Answer #1
got it nvm.. thanks