Re: A86: Error checking
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Re: A86: Error checking
Ok, let me elaborate. Some one wrote to me saying:
I think the problem was that (game X) overwrote some
system variables. (Game Y and Game Z) both use a lot of high level rom
calls, and so probably accessed some of the overwritten data. Specifically,
I
think it was the call _RANDOM that messed things up. On my 86, it caused a
crash maybe 1 in 100 times, but I imagine they introduced some ERROR
CHECKING
in rom 1.5, though that's just a guess. Anyway, I altered (game X) to use
the
ram at the end of _asm_exec_ram instead of the system vars, so everything
should be OK (I hope).
Now, to the point. Was there any error checking introduced in rom 1.5?
Please forgive me if I am not making any sense, but I have clarified it as
much as possible.
Jean Vásquez
--
Jean Vásquez
,;; vasquezjara@earthlink.net
,;;' Dark Horizon Studios
, ,;;' http://www.afterlyfe.com/darkhorizon
';;' AIM SN: Leon Pierr
.' ', ICQ#: 14164471
Cassady Roop wrote:
> I don't know if this is anything similar to what you wanted to know, but
> all of the user routines use error checking. They only execute if a
> checksum matches the sum of the first, 40th, 80th, 120th, 160th, and
> 200th bytes of the user routine. What exactly did you mean?
>
> VasquezJara wrote:
> >
> > I have a quick question that might be a dumb one. Is there
> > any form of error checking in any versions of the rom? I
> > have no idea, and this is why I ask. Forgive me if its a
> > dumb question.
> >
> > Jean Vásquez
> >
> > --
> > Jean Vásquez
> > ,;; vasquezjara@earthlink.net
> > ,;;' Dark Horizon Studios
> > , ,;;' http://www.afterlyfe.com/darkhorizon
> > ';;' AIM SN: Leon Pierr
> > .' ', ICQ#: 14164471
References: