Subject: Re: [stella] signed math From: "Thomas Jentzsch" <tjentzsch@xxxxxx> Date: Thu, 29 Jan 2004 09:40:19 +0100 |
Glenn wrote > If the number is negative, why do you do an adc instruction instead of a > sbc instruction? Because adding a negative value is the same as subtracting a positive one. > Is this example complete or is there something missing? I am having problems to follow myself. Maybe this one is more clear: ldy #0 lda fracvel bpl .posvel dey .posvel: clc adc fracpos sta fracpos tya adc intpos sta intpos Have?fun! Thomas _______________________________________________________ Thomas?Jentzsch?????????|?***?Every?bit?is?sacred?!?*** tjentzsch?at?web?dot?de?| ______________________________________________________________________________ Nachrichten, Musik und Spiele schnell und einfach per Quickstart im WEB.DE Screensaver - Gratis downloaden: http://screensaver.web.de/?mc=021110 ---------------------------------------------------------------------------------------------- Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://www.biglist.com/lists/stella/
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