Re: [cc65] Customization of cc65 for new targets

From: Bruce & Ann Reidenbach <bereiden1gmail.com>
Date: 2010-02-18 16:07:48
Oliver,

So in general it's the "map of memory available to the cc65 program" what
> the .cfg files describes.
>

Ahhh ... got it!  That helps me out a lot!  So instead of saying:

The cc65 toolset requires a memory configuration file to define the memory
> map of the system
>

I should really say:

The cc65 toolset requires a memory configuration file to define the memory
> that is available to the cc65 run-time environment
>

I have modified the text after the memory configuration as follows:

ZP defines the available zero page locations, which in this case starts at
> $0 and has a length of $100.  Keep in mind that certain systems may require
> access to some zero page locations, so the starting address may need to be
> adjusted accordingly to prevent cc65 from attempting to reuse those
> locations.  Also, at a minimum, the cc65 run-time environment uses 26 zero
> page locations, so the smallest zero page size that can be specified is
> $1A.  The usable RAM segment begins after the 6502 stack storage in page 1,
> so it is defined as starting at location $200 and filling the remaining 4K
> of space (4096 - 2  256 = 3584 = $0E00).
>

Does this sound better?

Bruce

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Received on Thu Feb 18 16:07:53 2010

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