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Re: 64 bit addressing

I won't presume people aren't aware that these issues have been dealt with by other vendors but I thought this chapter
of SGI's MIPSpro 64-Bit Porting and Transition Guide might illustrate some points. SGI's Irix 6.x operating systems
support both 32 and 64-bit applications. I don't know what strategy Apple has or will adopt but having ported a lot
of code to both 64 and 32-bit systems, I found SGI's approach worked well.

<http://techpubs.sgi.com/library/tpl/cgi-bin/ getdoc.cgi?coll=0650&db=bks&srch=&fname=/SGI_Developer/MProPort_TG/ sgi_html/ch01.html>

ber
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