[Coco] converted AGD games - BIGPacks v2.4 released

[Arthur Flexser]

So, let me see if I have this straight, now.  I was previously under the
impression that all these converted games were games where you had access
to the original AGD script files used to generate the Spectrum version of
the game.  As I now understand it, what you had access to was the
already-compiled game for the Spectrum, and you wrote a C program to work
backwards from that to regenerate a version of the original AGD script file
that wasn't available.  This, I gather, was possible because AGD stores
things like tiles and sprites, etc. in some consistent format somewhere in
the Spectrum's memory map that allowed a memory snapshot to be analyzed to
figure out what the original AGD script looked like.  Then from there,
conversion for the CoCo or Dragon was possible using a 6809-modified
version of the original C-language Spectrum AGD compiler that you also
wrote.

Have I got that right?

Nice going!

Art

On Sun, Jul 21, 2019 at 5:31 AM Pere Serrat <psergm at gmail.com> wrote:

> On previous message I forgot to change the SUBJECT, so sorry :-(
> ===================================================================
>
> Hello Art,
> I must say that what we get from internet are the original Spectrum files
> and this means a .tap or .sna (tape file or snapshot)
> We use a converter program (again in C) that analyzes the snapshot
> and creates a script file "GameName.AGD"
> Of course we can not expect the converter to create comments as
> the AGD commands are very simple and can be used for a lot of different
> purposes, some of them a bit tricky upon programmer skills.
>
> I have created a thread in archive .worldofdragon with four examples
> and even included the AGD manual.
> http://archive.worldofdragon.org/phpBB3/viewtopic.php?f=7&t=6131
>
> Any question that should arise, please, feel free to put it on that thread
> cheers
> pere
>
> > ------------------------------
> >
> > Message: 6
> > Date: Sat, 20 Jul 2019 16:23:11 -0400
> > From: Arthur Flexser <flexser at fiu.edu>
> > To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
> > Subject: Re: [Coco] converted AGD games - BIGPacks v2.4 released
> > Message-ID:
> >       <
> CA+LuDcfq6YMnHq4wtEKz+VyiOTwbQehQn-jB_+3TG2G0tMGpwA at mail.gmail.com>
> > Content-Type: text/plain; charset="UTF-8"
> >
> > Thanks, Pere.  I would be curious to see what an AGD script file looks
> > like.  I have no preference as to what it might be, just that it might be
> > helpful if there were comments as to what lines or sections do what.  I
> > have not played any actual AGD games, I'm just approaching it as a casual
> > onlooker without game-writing experience, but with some curiosity about
> > what a gaming language/script might look like.  If there's a reference
> > sheet listing the AGD commands and their syntaxes, that would be
> > particularly helpful.
> >
> > Art
> >
>
>
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