Re: Translating nasm boot strap to as

> and to fill the file:
> 
> times510-($-$$)  db  0
> 
> I didn't find any $$ translation in as

Actually, in this particular case, a more straightforward solution is
to just assign . a new value, like this:

. = .data + 510

(assuming that this appears in your .data section)

b