Re: [stella] A tiny tip

Subject: Re: [stella] A tiny tip
From: "Andrew Davie" <atari2600@xxxxxxxxxxxxx>
Date: Thu, 15 Apr 2004 15:57:58 +1000
Wellll.... it might have an effect on some future bankswitching hardware on
which your program might be run.
For example, the Krokodile cartridge does bankswitching based on writes to
ROM... so I wouldn't assume that writes to ROM will always have no effect!
Safer, I think, to do it another way.  We *really* need all of this in a
wiki -- any volunteers to host one?

----- Original Message ----- 
From: "Paul Slocum" <paul-stella@xxxxxxxxxxxxxx>
To: <stella@xxxxxxxxxxx>
Sent: Thursday, April 15, 2004 3:41 PM
Subject: Re: [stella] A tiny tip

> >Not sure if this has come up here before, but I just discovered it.  To
> >waste an odd number of cycles, we usually use the unofficial instruction
> >NOP $00.  Exactly the same effect (3 cycle delay, no registers or flags
> >affected) can be achieved legally (using one more byte of ROM) by doing:
> I just use STA $2D which is 2 bytes and has no effect on the 2600.  I
> compiled a lot of mine and others' ideas for wasting cycles in that guide
> was working on.
> -paul
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