MOVing between two memory addresses

Question

I\'m trying to learn assembly (so bear with me) and I\'m getting a compile error on this line:

mov byte [t_last], [t_cur]

The error is

Answer 1

It's really simple in 16 bit, just do the following:

     push     di
     push     si
     push     cx
     mov      cx,(number of bytes to move)
     lea      di,(destination address)
     lea      si,(source address)
     rep      movsb
     pop      cx
     pop      si
     pop      di

Note: the pushes & pops are neceessary if you need to save the contents of the registers.