[Coco] Memory Map

[Luis Antoniosi (CoCoDemus)]

PMODE4 video memory is often set to it.


On Wed, May 8, 2013 at 10:59 AM, Fedor Steeman <petrander at gmail.com> wrote:

> Hmm. Why $0E00? What's directly before that that may give you trouble?
>
> /Fedor
>
>
> On 8 May 2013 16:52, William Astle <lost at l-w.ca> wrote:
>
> > On 13-05-08 08:12 AM, John W. Linville wrote:
> >
> >> On Wed, May 08, 2013 at 10:08:16AM -0400, Louis Ciotti wrote:
> >>
> >>> AAAAaaa OK I get it now.
> >>>
> >>> So changing SWI to rts, pressing a key get me back to DECB when using
> >>> lwasm.
> >>>
> >>> I am learning, slowly but I am learning.
> >>>
> >>> Now if I can get the sample to work with the ORG statement.
> >>>
> >>
> >> I guess I missed that part...how are you loading the code and executing
> >> it?  It seems like the ORG statement would be a necessity for lwasm
> >> to generate a working binary.  Maybe it has some built-in default?
> >>
> >
> > lwasm defaults to "org 0" so if it is working without an ORG statement,
> > it's only working by accident.
> >
> > With a default configuration of disk basic, putting the code anywhere
> > between $e00 and $2600 should work fine because that is within the
> default
> > 4 pmode graphics pages. If you don't need to preserve a basic program,
> you
> > can clobber anywhere from $e00 up to about $3c00 fairly safely (asuming
> > 16K) or $7c00 (assuming 32K).
> >
> > If you put the binary created by lwasm on a disk image and use LOADM and
> > EXEC to start it, it should work just fine. If you're using some other
> > method, it may be that method is not doing the expected thing.
> >
> >
> > --
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> >
>
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