Re: [stella] Climber5 source and binary

Subject: Re: [stella] Climber5 source and binary
From: Thomas Jentzsch <tjentzsch@xxxxxx>
Date: Thu, 17 Apr 2003 18:11:13 +0200

Andrew wrote:
>Two ways to make a number negative are...

Number three is:
	lda	number
      sec
	sbc	#1
	eor	#$FF

If you know the status of the carry flag, you can always select one 
where you can avoid sec/clc.

Have fun!	
Thomas






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Current Thread
Re: [stella] Climber5 source and binary, (continued) Fabrizio Zavagli - Thu, 17 Apr 2003 15:56:16 -0400 (EDT) Dennis Debro - Thu, 17 Apr 2003 10:43:24 -0400 (EDT) Dennis Debro - Thu, 17 Apr 2003 10:59:47 -0400 (EDT) Andrew Davie - Thu, 17 Apr 2003 22:25:14 -0400 (EDT) Thomas Jentzsch - Thu, 17 Apr 2003 12:07:29 -0400 (EDT) <= Thomas Jentzsch - Thu, 17 Apr 2003 15:48:11 -0400 (EDT) Dennis Debro - Fri, 18 Apr 2003 08:32:29 -0400 (EDT) Andrew Davie - Fri, 18 Apr 2003 09:28:51 -0400 (EDT) Thomas Jentzsch - Fri, 18 Apr 2003 13:55:11 -0400 (EDT)

Current Thread

Re: [stella] Climber5 source and binary, (continued)
- Fabrizio Zavagli - Thu, 17 Apr 2003 15:56:16 -0400 (EDT)
- Dennis Debro - Thu, 17 Apr 2003 10:43:24 -0400 (EDT)
- Dennis Debro - Thu, 17 Apr 2003 10:59:47 -0400 (EDT)
  - Andrew Davie - Thu, 17 Apr 2003 22:25:14 -0400 (EDT)
- Thomas Jentzsch - Thu, 17 Apr 2003 12:07:29 -0400 (EDT) <=
  - Thomas Jentzsch - Thu, 17 Apr 2003 15:48:11 -0400 (EDT)
- Dennis Debro - Fri, 18 Apr 2003 08:32:29 -0400 (EDT)
  - Andrew Davie - Fri, 18 Apr 2003 09:28:51 -0400 (EDT)
  - Thomas Jentzsch - Fri, 18 Apr 2003 13:55:11 -0400 (EDT)

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