[Coco] Proof-of-concept to make 16KB HDB-DOS ROMs seamlessly

[Juan Castro]

Exactly. But I did have to make a few changes to the current 8K ROMs (see
the patch):

- Insert the E000 signature test code;
- Change a BSR to JSR because a routine became too far away;
- Shorten some messages to make way for the two things above.

That's why I'm asking if it's okay to commit.


On Fri, Jan 31, 2014 at 12:47 AM, Bill Pierce <ooogalapasooo at aol.com> wrote:

>
> Juan,
> I would commit it as a new rom. Leave the old "as is".'
> Create an "hdbdos_16k.rom" or something.  This way, "just in case"
> something isn't right, we can fall back and no "current" builds are
> screwed. I think this is what's been happening in the past and causing us
> to lose what we had before. It will also give us code to play with (as in
> adding routines) without losing the current HDBDOS that works well.
> This may be what you are intending, just stating this to clarify :-)
>
>
> Bill Pierce
> "Today is a good day... I woke up" - Ritchie Havens
>
>
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> https://sites.google.com/site/dabarnstudio/
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>
>
> -----Original Message-----
> From: Juan Castro <jccyc1965 at gmail.com>
> To: CoCo List <coco at maltedmedia.com>
> Sent: Thu, Jan 30, 2014 9:36 pm
> Subject: Re: [Coco] Proof-of-concept to make 16KB HDB-DOS ROMs seamlessly
>
>
> Boisy, Tormod... can I commit this?
>
>
> On Thu, Jan 30, 2014 at 10:44 PM, Juan Castro <jccyc1965 at gmail.com> wrote:
>
> > I replicated the "two byte ASCII signature" scheme to allow for playing
> > with those unused top 8KB of ROM space. The example just puts an
> > exclamation point at the top right of the screen, but you can do
> anything.
> > Tell me what you think.
> >
> > I made it so, if the top 8KB don't exist, it still works as before. I had
> > to condense a couple of messages. The makefile builds the normal 8K ROMs
> as
> > before, and also the 16K roms (prefix el-).
> >
> > (This is a patch for the current source in Toolshed's Mercurial.)
> >
> > https://dl.dropboxusercontent.com/u/15643089/hdbdos-16krom.patch
> >
> > Juan
> >
>
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