hardware multiply/divide functionality in CPUs
cclist at sydex.com
Tue Mar 8 18:14:32 CST 2011
On 8 Mar 2011 at 15:33, Brent Hilpert wrote:
> You say the 9440 doesn't have M/D, the book does explicitly indicate
> they are present for the 9440 .. the book is in error?
Apparently. Take a look at Volume II's instruction set description.
The MPY and DIV are listed as not being on the 9440. (They are on the
later 9445). Osborne's book indicates that the 9440 supported the
"basic" Nova 800 set of instructions and features.
I take that to mean the features present on a "basic" Nova 800. On
those, the DIV and MUL instructions were an option, so it's
reasonable to speculate that the 9440 didn't have them.
We could decide with some certainty if a 9440 datasheet could be
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