[Coco] Memory Map

[William Astle]

On 13-05-08 08:59 AM, Fedor Steeman wrote:
> Hmm. Why $0E00? What's directly before that that may give you trouble?

Buffers and other critical data used by disk basic for things such as 
loading your binary from disk. And that's assuming you haven't used the 
"FILES" command to make the disk basic buffer area bigger (which you 
won't have unless you have a reason to).

You really want to stay out of the area from $0000 to $0e00 to avoid 
clobbering anything important to disk basic.

>
> /Fedor
>
>
> On 8 May 2013 16:52, William Astle <lost at l-w.ca> wrote:
>
>> On 13-05-08 08:12 AM, John W. Linville wrote:
>>
>>> On Wed, May 08, 2013 at 10:08:16AM -0400, Louis Ciotti wrote:
>>>
>>>> AAAAaaa OK I get it now.
>>>>
>>>> So changing SWI to rts, pressing a key get me back to DECB when using
>>>> lwasm.
>>>>
>>>> I am learning, slowly but I am learning.
>>>>
>>>> Now if I can get the sample to work with the ORG statement.
>>>>
>>>
>>> I guess I missed that part...how are you loading the code and executing
>>> it?  It seems like the ORG statement would be a necessity for lwasm
>>> to generate a working binary.  Maybe it has some built-in default?
>>>
>>
>> lwasm defaults to "org 0" so if it is working without an ORG statement,
>> it's only working by accident.
>>
>> With a default configuration of disk basic, putting the code anywhere
>> between $e00 and $2600 should work fine because that is within the default
>> 4 pmode graphics pages. If you don't need to preserve a basic program, you
>> can clobber anywhere from $e00 up to about $3c00 fairly safely (asuming
>> 16K) or $7c00 (assuming 32K).
>>
>> If you put the binary created by lwasm on a disk image and use LOADM and
>> EXEC to start it, it should work just fine. If you're using some other
>> method, it may be that method is not doing the expected thing.
>>
>>
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>
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