BITS 16
CPU 8086

main:
    mov bp, sp
    mov si, [bp+4]
    mov cx, [si]
    mov si, [bp+6]
    mov di, [si]
    mov si, [bp+8]
    mov si, [si]
    push ds
    push es
    pop ds
    cld
    rep movsw
    pop ds

    retf 6