[cc65] More on Zero page vars

From: Tachdaun <tachdaun1gmail.com>
Date: 2009-02-08 18:10:03
Good. Danke.
Another one:

in [nes.inc] there are some Zeropage vars defined, which seem to end 
around here:
[...]
ppuhi           = $74
ppulo           = $75
ppuval          = $76

So, do I have $77 to $FF of zeropage space free to mess around?
Isn't it reserved or used for some kind of buffering, stack... anything 
like that?
I defined a zp var at $77 in this file, compiled, .exportzp and 
.importzp'ed it and worked fine from C, but I don't know if I'll mess 
around with the startup code, runtime, library, etc.

Groepaz wrote:
> its for the ORIC if i recall correctly, certainly not needed for the NES :)
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Received on Sun Feb 8 17:10:56 2009

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