[Coco] The Hobbit ported to 6809 (Dragon64 and coCo2 64k)

[Brett Gordon]

Awesome sauce.  You could check the interrupt vectors to detect a coco3...
if they point to $fexx its a coco3.

brett
On Aug 21, 2016 6:12 PM, "Pere" <psergm at gmail.com> wrote:

> Hi Art,
> I have found a hole with just 26 bytes and have moved there some
> structured data
> that need exactly 26 bytes.
> With this small change, the compilated BIN works flawlessly in VCC2.0.1b
> after
> issuing the POKE&HFFDE,0 of course.
> It is nice to see it working on the CoCo3 too!
> Now I think it is time to include the patch for RSDOS and that one for
> CoCo3
> inside the binary, so no more need to use auxiliar programs.
> By now to detect CoCo I am checking that $C008-09 do contain $DF4C (RS-DOS)
> so now I will need a way to detect it is a CoCo3 instead so that the extra
> Poke
> is done too ... only when needed!
>
> thanks a lot for you help, Art.
> You are very kind!
>
> cheers
> pere serrat
>
> ------------------------------------------------------------
> ------------------------------------------------------------
> Previous message (by thread): [Coco] The Hobbit ported to 6809 (Dragon64
> and coCo2 64k)
> Arthur Flexser flexser at fiu.edu
> Sun Aug 21 16:29:57 EDT 2016
> The new interrupt vectors in the CoCo 3 actually take up only $FEEE-FEFF,
> so you don't need to worry about a full 256 bytes, only 18 bytes.
>
> The poke to $FFDE does the same in a CoCo 3 as in the earlier CoCos, but
> has the byproduct of removing Super Extended Basic and restoring Basic to
> its earlier configuration.  An exception is that $FE00-FEFF remains in the
> RAM mode unless you change a particular bit in the GIME as well, and doing
> so would probably cause a crash because you'd be switching out these
> vectors.
>
> Art
>
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