Re: [cc65] CBM units

From: Ullrich von Bassewitz <>
Date: 2010-02-21 13:44:27
On Sun, Feb 21, 2010 at 12:10:25AM +0100, Groepaz wrote:
> its just the clean way to do it :) and you cant be sure what a - potentially
> modified/alternative - kernal uses it for, and how.

Assuming that zero is left in this memory cell, do you really think, anything
bad could happen? We're talking about two bytes for the store instruction, so
it's not really important. On the other side, two bytes here and three bytes
there add up. Just have a look at the diet the Atari library went through
lately - it had a rather drastic effect on the executable size. So if there is
no real reason for it, I would leave $ba as it is and just use 8 in case it
contains zero. 

While thinking about it: I doubt that $ba could contain zero, because the cc65
compiled program has to be loaded from somewhere, so $ba would in any case
contain the drive from which the program was loaded.

> personally i dont see a
> reason for not simply using $ba as the place to store the variable that keeps
> the current drive number :)

That's difficult to achieve in a multi platform library.



Ullrich von Bassewitz                        
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Received on Sun Feb 21 13:44:36 2010

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