Re: [stella] An Efficient Waste Of Time

Subject: Re: [stella] An Efficient Waste Of Time
From: Chris Wilkson <ecwilkso@xxxxxxx>
Date: Thu, 17 Oct 2002 20:19:30 -0400 (EDT)
On Thu, 17 Oct 2002, Christopher Tumber wrote:

> 3 Cycles (2 bytes)
> STA $ZeroPage
>      or
> LDA $ZeroPage
>      or
> DOP $ZeroPage
> Notes: STA/LDA Destroys register or RAM location (use scratch variable)

STA to locations $2D-$3F will do nothing...these addresses are unused.
They aren't even decoded!

What does DOP do???

> 5 Cycles (2 bytes)
> dec $ZeroPage
> Notes: Destroys RAM location (use scratch variable)

Again, DEC $2D-$3F will work here without corrupting anything.



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