Re: [stella] An Efficient Waste Of Time

Subject: Re: [stella] An Efficient Waste Of Time
From: Christopher Tumber <christophertumber@xxxxxxxxxx>
Date: Fri, 18 Oct 2002 01:28:21 -0400

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

Ah, thanks! Mental note and all that!

>What does DOP do???

Double nOP. It's an illegal/undocumented op-code. Similar to a regular NOP but with ZeroPage/Immediate/Indexed addressing modes.

http://members.chello.nl/taf.offenga/illopc31.txt



Chris...

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Current Thread
RE: [stella] Space Instigators - Final Version (?), (continued) Eric Ball - Thu, 17 Oct 2002 15:32:44 -0400 (EDT) Christopher Tumber - Thu, 17 Oct 2002 16:33:51 -0400 (EDT) Christopher Tumber - Thu, 17 Oct 2002 17:00:28 -0400 (EDT) Chris Wilkson - Thu, 17 Oct 2002 20:16:11 -0400 (EDT) Christopher Tumber - Fri, 18 Oct 2002 01:28:38 -0400 (EDT) <= Andrew Davie - Fri, 18 Oct 2002 05:00:41 -0400 (EDT) Thomas Jentzsch - Fri, 18 Oct 2002 08:08:24 -0400 (EDT) Christopher Tumber - Fri, 18 Oct 2002 18:34:57 -0400 (EDT) Eric Ball - Fri, 18 Oct 2002 08:07:52 -0400 (EDT)

Current Thread

RE: [stella] Space Instigators - Final Version (?), (continued)
- Eric Ball - Thu, 17 Oct 2002 15:32:44 -0400 (EDT)
  - Christopher Tumber - Thu, 17 Oct 2002 16:33:51 -0400 (EDT)
    - Christopher Tumber - Thu, 17 Oct 2002 17:00:28 -0400 (EDT)
    - Chris Wilkson - Thu, 17 Oct 2002 20:16:11 -0400 (EDT)
    - Christopher Tumber - Fri, 18 Oct 2002 01:28:38 -0400 (EDT) <=
    - Andrew Davie - Fri, 18 Oct 2002 05:00:41 -0400 (EDT)
    - Thomas Jentzsch - Fri, 18 Oct 2002 08:08:24 -0400 (EDT)
    - Christopher Tumber - Fri, 18 Oct 2002 18:34:57 -0400 (EDT)
- Eric Ball - Fri, 18 Oct 2002 08:07:52 -0400 (EDT)

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