I wrote the following program to read a port and then write to another port:

mov dptr, #PORTACFG
mov acc ,#11111111b
movx @dptr , a
mov dptr, #OEB
mov acc ,#11111111b
movx @dptr , a
loop: mov dptr, #PINSA
movx a ,@dptr
mov dptr, #OUTB
movx @dptr , a
jmp loop
END
using this code i am able to write to all the 8 pins of a port but i can only read one of the pins which is the first pin of the whole port, which means when i tried to read another pin i could not. can anyone tell me how should i edit the program so that i will be able to read all the 8 pins of the whole port?

thanks