Is there a way to stop fasm giving the error 'operand sizes do not match.'? I've got 32 reserved bytes with an ASCII string, and to do comparing I figure the fastest way to do it is 4 bytes at a time. However, because the string is defined with rb, if I try 'mov eax, [user+ecx]' then it will give the operand size error because it doesn't understand that I want to load four bytes of data into eax, rather than just the one.

Is there any way to coerce the assembler into letting me do this? Reserving the bytes with rd isn't an option, because I need to play with the individual bytes of the string in other parts of the code.

The only solution I can think of is loading each byte into al and then doing a shl 8, but that's so tedious I may as well just give up and write my program in C.

AzraelUK, use label directive or override type with dword operator.

Or just use the dword override:

revolution,

I thought about two labels to the same address and edited post… And you was first, Mr. Hyde!

baldr: Too slow Dr. Jekyll.

The easiest is just put a colon after your label.
So instead of
use