[Coco] How to get into CoCo 6809 assembly?

[Aaron Wolfe]

On Sun, Feb 5, 2012 at 8:18 PM, Robert Gault <robert.gault at att.net> wrote:
> Blake Patterson wrote:
>>
>> So I've now got both a DriveWire and a FD-500 floppy disk system (though
>> one of the drives is apparently not connected inside the enclosure - need to
>> figure that out). I'd like to fiddle around with 6809 assembly on the CoCo
>> 3.
>>
>> Can someone point me to an assembler package I'd need? I'd like to fiddle
>> around with CoCo 3 screenmodes, etc -- so I want to write a few "CoCo 3" vs.
>> prior programs.
>>
>> Also, what's a good general 6809 reference and reference for the internals
>> info I'd need to access the CoCo 3 itself?
>>
>> Thanks much, in advance!
>>
>
> You should try Tandy's Disk EDTASM+ which should be in the following zip
> file:
> http://www.tandycoco.com/dsk_imgs/rs-dos/cocodownunderrsdos.zip
> It may be at other sites also.
>
> If it turns out that you want a better enhanced version, you can consider
> the patch I sell for EDTASM+.
> http://aaronwolfe.com/robert.gault/Coco/Sales/Edtasm6309.htm
>
> If you decide that you would rather work with a full screen rather than a
> line editor, consider buying one of Roger Taylor's products such as
> RainbowIDE. You can create source code, assemble it, and immediately test it
> in MESS Coco emulation.
>
> One of the best books on the 6809 is "6809 Assembly Language Programming" by
> Lance A. Leventhal. You should get a copy of the Coco3 service manual:
> ftp://maltedmedia.com/coco/MANUALS/TANDY/HARDWARE/COCO3/
> You should also get a copy of all the Spectral Associates "Unravelled"
> series:
> ftp://www.rtsi.com/RSDOS/incoming/UnravelledSeries/
> Many good pdf files, including the Leventhal, are at
> http://cococoding.aaronwolfe.com/home/docs
>

There is also lwtools, if you want to write code on a modern machine
its very nice:

http://lwtools.projects.l-w.ca/