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

[Pere]

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

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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