mov101.asm

; MOV instruction
; Used to move a byte, word(16bit), double word(32bit), or quad word(64bit) from the source(second operand) to the dist(first operand).
; **Note** that the MOV instruction cannot move data directly from one address in memory to different address in memory
; to do that you need to _two separate MOV instructions: frst move the datat from the memory to some registry and then move it from that registry to the dist memory.
; Assemble with:
;        nasm -f elf64 -g -F dwarf mov101.asm
;        ld -o mov101 mov101.o

section .data
section .text

global .start
start:
        mov        rbp, rsp        ; for debugging
        nop                        ; debugging
        ; Immediate addrissing
        mov        rax, 42h        ; put 0x42 in RAX
        ; **NOTE** Immediate data must be of an appropriate size of opperand. Fore example, you can't MOV 16-bit immediate value to a 8-bit register.
        mov        dh, 067efh        ; NASM shows a wroning, 'cause DH is a 8-bit reg
        mov        cl, 087efh        ; This is wrong too, because CL is a 8-bit reg
        ; NASM allows some interesting forms of immediate values. like strings
        mov        eax, 'Anas'
        nop

section .bass