Re: A83: Re: Negative or positive?
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Re: A83: Re: Negative or positive?
In accordance with the prophecy, Harper Maddox uttered:
>
> When coding assembly, you have to scrap alot of techniques that worked well
> for Basic, such as adding a positive or negative number to increment a
> value.
>
No, those techniques will work fine. If you have a coordinate (say, 42) and
add -1, you get 42 + 255 = 297, which is 100101001 in binary notation. Only
the rightmost 8 bits are kept, though, and they are 00101001, which is 41.
Tadaa!
Linus
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I'm not a complete idiot - several parts are missing.
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lairfight@softhome.net, visit http://linusworld.cjb.net (PGP key available).
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