beginner question specifying size

[pablowablo]

Hello,

How do I specify the size of my operands in an instruction?

I use nasm and I get an operation not specified error with

mov [data] , 10

I'm guessing this is because the assembler does not know how big it should move to data...


thanks!

[NoHero]

There is a small trick: Just will it up with nulls.

; And so on
mov eax, 000010h
mov ax, 0010h
mov ah, 10h

[svenhag]

If data is a dword (4 bytes) then you just write

mov dword [data], 10