Re: A82: multiply by 12


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Re: A82: multiply by 12




that's what I did, but assume that the number to by multiplied is 8-bit and
could possibly overflow into a 9 or even 10-bit state (requiring the use of a
16-bit reg).  assume the number to multiply is stored in register E and that
the final answer is stored in bc (even if it's still only 8 bits...if thats
the case then of course b will be 0)
thanx!

~Adamman

In a message dated 98-05-18 21:33:28 EDT, you write:

> double it. (rotate/shift whatever...)  (x2)
>  double it again (x4)
>  save that in a var.
>  double the original (x8)
>  add the ans and the saved one. (x12)
>  
>  that should work.  (wow... i actually learned something in stuy...)
>  
>  -Greg
>  
>  
>  
>  
>  On Mon, 18 May 1998 21:23:05 EDT ADAMMAN106 <ADAMMAN106@aol.com> writes:
>  >
>  >does anyone know a fast way to multiply a number by 12?  I need it for 
>  >FLine
>  >(that substitute for FIND_PIXEL I posted will not work).  Please help.
>  >Thanks
>  >
>  >~Adamman
>  >
>  
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