Re: [cc65] Running C program in a cart

On Fri, May 25, 2012 at 4:36 PM, Groepaz <groepaz@gmx.net> wrote:

> On Friday 25 May 2012, Ullrich von Bassewitz wrote:
> > Good evening!
> >
> > On Fri, May 25, 2012 at 03:28:38PM -0500, Payton Byrd wrote:
> > >    Now, the cart compiles and loads into VICE, and when it's loaded as
> a
> > >    Cart the screen and border turn white which is as expected based on
> > >    the code in the header.  The compiled binary then drops straight
> into
> > >    the CC65 initialization code that is normally at 2061 as you would
> > >    expect.  The problem is that somewhere during initialization the
> > >    system goes into an infinite loop of displaying garbage on the
> > >    screen.
> >
> > I don't know much about C64 carts, but aren't they enabled by modifying
> > $01? If so, the startup code will probably disable the cart from where
> the
> > code is loaded because it modifies $01 to switch off the BASIC ROM.
>
> yes, if the crt0 changes $01 to bank out basic, then it would also bank out
> the cartridge - so what has to be done is writing a slightly adapted crt0
> (which probably should also copy the DATA segment into ram, i guess).
>
>

How do I get cc65 to use a custom crt0.s file?  Do I have to recompile the
libraries?

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