Re: [cc65] Customization of cc65 for new targets

From: Shawn Jefferson <>
Date: 2010-02-17 22:52:40
I don't believe that is true for all targets.  The Atari 8-bit has a zeropage size of $80 and the Atari Lynx has much more.  At least, I think that what you are referring to is the amount of zeropage space that is safe for cc65 to use, as listed in the linker config file?  Where zeropage space starts and the size of it is going to very platform dependent, and that should probably be pointed out in the document (which I haven't had a chance to read yet, sorry!)


----- Original Message -----
From: Oliver Schmidt <>
Date: Wednesday, February 17, 2010 11:54 am

> If the guide targets not only bare-metal (or rather bare-virtual-metal
> in your case ;-)) developers I'd really like to see the zeropage
> memory area size reduced from $100 to $1A. This is the ammount of
> zeropage space used by cc65. And the config file doesn't describe
> what's there but describes what's used. Just the same with the RAM
> area starting at $200 instead of $0. For any target running 
> inside an
> OS and/or BASIC environment coordinating the zeropage space 
> usage is
> crucial and therefore it would help a newbie a lot to understand how
> much zeropage locations cc65 needs. If you check out the existing
> configurations you'll notice that they all have a zeropage size of
> $1A.

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Received on Wed Feb 17 22:52:49 2010

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