RE: 'Divide by A' procedure in 90x0 ROM

From: Baltissen, GJPAA (Ruud) <>
Date: Fri, 18 Feb 2011 15:03:31 +0100
Message-ID: <>
Hallo Groepaz,

> look at this one: ....

Didn't help me either :(

> think of how you divide on paper, 

I made a routine once according this: I shifted the divisor n times to
the left, stored it and tried to substarct this value from the input.
Then I shifted the stored value to the right once and tried to substract
it again. I did this n times. IMHO this is the same way as doing it on

Here is only one shift operation going on. The only thing I can imagine
(even more then just imagine) that this routine is the bottom-up
approach of the division on paper. And THAT is something I can
understand :)

Many thanks!

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