Re: [cc65] Zeropage Vars

From: Tachdaun <tachdaun1gmail.com>
Date: 2009-02-05 17:16:59
Hi.
The NES library has this zp var defined in [nes.inc]:
tickcount       = $6b           ;2

Which increments in the NMI interrupt routine ( called each VBlank )

I want to access it from C.
I've tried this, but it doesn't work, I'm not getting it right:

extern char tickcount;
#pragma zpsym ("tickcount");

How's the correct way to do this? if it's possible?
Does #pragma zpsym() create a var in the zp? I mean, the are 26 bytes of 
zp vars defined by the NEs runtime, #pragma zpsym() creates vars after 
that 26 bytes?

I know I can access this variable with *((char*)0x6B), but would like to 
use a 'cleaner' way, if there is.

Thanks!

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Received on Thu Feb 5 16:17:48 2009

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