Re: [Re: [A85: Re: ]]
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Re: [Re: [A85: Re: ]]
wow, that was illegible!!
Robin <funky_cheeze@usa.net> wrote:
> JayEll64@aol.com wrote:
> >
> > In a message dated 10/13/99 6:00:52 PM MDT, malcolmj1@juno.com writes:
> >
> > > this email is mainly directed towards jimmy mardell but i thought i'd
> > > write it here on asm85.
> > >
> > > how did you make the relocation program (the one using the '&'s in the
> > > source for absolute addresses) and implement it with usgard.
> > >
> > > does usgard search the program to find special bytes signifying an
> > > absolute call and add the program address to it?
> > >
> > > does the relocation program add a certain constant address to the
> > > absolute jumps?
> > >
> > > are these addresses calculated among the assembler's tasks, at run
time,
> > > or just before run time?
> > >
> > > thanks a ton.
> > >
> > > jimi
> >
> > What I *think* happens is that Usgard, when compiling the source code into
> > object code (or binary code or whatever code comes between the source and
> > *.85s file), it creates a table at the end that lists all the addresses
that
> > relocation needs to occur at. I don't think it has the addresses the
actual
> > instructions are referring to, though. Then maybe it's
compressed...that's
> > my theory...I'd actually be interested in knowing if you ever figure out
the
> > answer ;)
> >
> > JayEll
>
>
> i asked jimmy about this once.
> i believe he said that the table is the abs. address, i.e. when you do "ld
hl,(&whatever)", it does the same as "ld hl,(program_addr)\ld
de,(whatever)\add hl,de" (that actually is common sense - even i know that.)
anyway, i believe they're not relative. 'course there's a 50% chance i'm
wrong.
>
> speaking of, anyone else out there use macs? 'cuz i know josh morris
(macross) does... 'cuz i read the page. anyway, that was just a question
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