Re: What's about the 65832 ?

[wbaguhn@nyx10.cs.du.edu (Will Baguhn)]

In article <320F5920.BAC@baldcom.net>,
Edhel Iaur  <drsmooth@baldcom.net> wrote:
>Gilles Tschopp wrote:
>
>> There was also a
>> mysterious 65816 opcode : WDM which the interview isn't very
>> clear.
>> 
>> What about the WDM opcode ?
>
>According to Checkmate Technology, Inc.'s MultiRam CX Kit manual, page 
>A.6, "WDM    There is One Reserved Op Code Defined as WDM Which Will Be 
>Used For Future Systems.  The W65SC816 Performs a No-Operation."
>
>I would guess it would be the same on a regular 65816.  How you 
>impliment an opcode AFTER the processor is built and installed, is quite 
>beyond me.
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Not just a no-op mind: it's a two-byte no-op.  The second byte defines
what it "should" be doing, and you're not supposed to use it in your
code if you expect your code to work on any later processors.

Next question regarding this sort of thing..... has anyone got a fast
mathematical routine package implemented via COP; as perhaps a PIF?

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