[Coco] 6809 Opcode informations...

[jens]

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=0Alhtym6D6yKjdFBtNmF0UVR5OW05S3psaURnUTNtSFE>

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/d0196f9843eac889456c2cee5a2f13047293200b/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