[Coco] 6809 Opcode informations...

[William Astle]

You might want to check out the 6x09 instruction set reference at 
cococoding.com, too. It even explains what the undefined opcodes do and 
the differences between 6809 and 6309. While not "structured" per se, it 
is very well organized and very detailed. Also, the Leventhal book (at 
the same site) is a good reference. See the link below:

https://sites.google.com/a/aaronwolfe.com/cococoding/home/docs


On 2013-10-19 09:25, Walt Zydhek wrote:
> Check out the following links. Those sites have nearly all the info you need
> on the 6809 and 6309 processors.
>
> Motorola MC6809 Reference - http://www.maddes.net/m6809pm/
> Hitachi HD6309 Reference - http://www.concentric.net/~Alxevans/6309/
>
> -Walt Zydhek
>
> -----Original Message-----
> From: coco-bounces at maltedmedia.com [mailto:coco-bounces at maltedmedia.com] On
> Behalf Of jens
> Sent: Saturday, October 19, 2013 5:12 AM
> To: 'Coco Email List'
> Subject: [Coco] 6809 Opcode informations...
>
>
> I need more detailed information about 6809 opcodes for DragonPy emulator.
>
> They are many different informations sprayed around the internet. But my
> question is if someone has structured data, which can be easily used in
> python.
>
> Currently i have some stuff collected here:
>
> 	https://github.com/jedie/DragonPy/tree/master/MC6809data
>
>   From this i have generate the content of this:
>
> 	
> <https://docs.google.com/spreadsheet/ccc?key=0Alhtym6D6yKjdFBtNmF0UVR5OW05S3
> psaURnUTNtSFE>
>
> the destination is to have this information about the opcodes:
>
> * Does the opcode needs the memory content (byte/word) or just a ea?
> * does the opcode writes the result back into memory (byte/word)
>
> something like this:
>
> ...
> 'ADD': {'ADDA': {'desc': 'A = A+M',
>                  'operand': 'A',
>                  'ops': {0x8b: 'IMMEDIATE',
>                         0x9b: 'DIRECT',
>                         0xab: 'INDEXED',
>                         0xbb: 'EXTENDED'},
>                  'read_from_memory': 'BYTE',
>                  'write_to_memory': '-'},
>          'ADDB': {'desc': 'B = B+M',
>                  'operand': 'B',
>                  'ops': {0xcb: 'IMMEDIATE',
>                         0xdb: 'DIRECT',
>                         0xeb: 'INDEXED',
>                         0xfb: 'EXTENDED'},
>                  'read_from_memory': 'BYTE',
>                  'write_to_memory': '-'},
>          'ADDD': {'desc': 'D = D+M:M+1',
>                  'operand': 'D',
>                  'ops': {0xc3: 'IMMEDIATE_WORD',
>                         0xd3: 'DIRECT',
>                         0xe3: 'INDEXED',
>                         0xf3: 'EXTENDED'},
>                  'read_from_memory': 'WORD',
>                  'write_to_memory': '-'}}, ...
>
> My currently full list is here: https://gist.github.com/jedie/7054130
>
>
> My current solution is simple: I look into the description of opcodes here:
> <https://github.com/jedie/DragonPy/blob/d0196f9843eac889456c2cee5a2f13047293
> 200b/MC6809data/MC6809_data2.py#L385-L490>
>
> And the code for this:
>
>       read_from_memory = "-"
>       if "=" in desc:
>           right = desc.split("=")[1]
>           if "M:M" in right:
>               read_from_memory = "WORD"
>           elif "M" in right:
>               read_from_memory = "BYTE"
>
>       write_to_memory = "-"
>       if desc.startswith("M:M"):
>           write_to_memory = "WORD"
>       elif desc.startswith("M ="):
>           write_to_memory = "BYTE"
>
>
> Has someone a complete information?
>
>
> Mfg.
>
>
> Jens Diemer
>
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