[A89] Re: help understanding this code
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[A89] Re: help understanding this code
that'll give you the same result without the hassle of keeping up with how
to manipulate the the data to get it to point to the right spot in the stack
if you have to change something in between.
>
> I took this code from technoplaza's assembly lessons:
>
> lea -3840(sp),sp
> pea 3840
> pea $4C00
> pea 8(sp)
>
> so if I'm not misunderstanding this the first line substracts 3840
> from the current address that's stored in sp and stores it in sp
> (saving 3840 bytes for us). The second line pushes 3840 (as a number)
> to the stack, increasing sp by 4, the third line pushes $4C00 to the
> stack and adds 4 to sp, the last line pushes the current sp address
> plus 8 bytes, that is, the address that was loaded in the first line.
> All this are passed as arguments to memcpy. So... Would this also
> work?
>
> lea -3840(sp),a0
> pea 3840
> pea $4C00
> pea (a0)
>
> if this works, what's the best approach and why?
> thanks a lot,
> ra.-
>
>
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