> The performance benefit of "compactness"> isn't worth (IMO) the breakage that 
> comes> with it.  Under laboratory conditions you> can create 32-bit programs 
> with AM64.  > They just can't (generally) deal with> 31-bit APIs, something 
> they must use to> get the benefit of 32-bit registers.  If> I have to jump 
> through hoops to break> my 4 GiB address space in half so I can 
> call 31-bit APIs, all the value leaks away. Hi Alan. What 31-bit APIs do you 
> think would break ifthey were run as AM64, and why can’t thatcode be updated 
> to be quadmodal (24/31/32/64)? I would want all the APIs updated prior to 
> anyonerunning 32-bit programs as AM64. I don’t wantprogrammers to have to 
> jump through hoops. BFN. Paul.

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