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IA-64 uses a different instruction decoder within the chip to handle IA-32 applications, and shares the same registers - at least eight of them (Pentium family chips have eight registers, compared to the IA-64's 256, 128 of them floating point).
Jim Carlson, director of worldwide IA-64 systems marketing at HP, said the development had been treated as "a virtual processor", using the same tests as on the real PA-64.
As more businesses move online, the need for powerful processors such as IA-64, and supporting software to handle the transaction volume increases.
Compaq VP industry standard server solutions Mary McDowell and Unix VP Don Jenkins reiterated that a port of Tru64 to IA-64 is still in the plan, although the OS' high-end pedigree is likely to lend itself to McKinley and its high-end IA-64 successors rather than the higher volume Merced part.
IBM says AIX's 64-bit kernel, memory model, static ELF linker and loader, 64-bit C compiler and Journaled File System are all up in an endian-neutral implementation on an IA-64 simulator.
With the horsepower of Intel's IA-64 processor and Metro Link's X Window System products, developers will be able to accomplish more, and at a less expensive price.
Interphase has worked closely with Intel through the IA-64 IHV testing process to ensure compatibility with original equipment manufacturers' next generation Itanium-based platforms.
This achievement is another industry first, following Bull's June announcement of the world's first successful porting of AIX(R) to an 8-way IA-64 server.
Indeed, Barry Crume, product marketing manager workstation systems division, claimed that the continuing development of dual processor architectures - Intel's IA-64 range and the PA RISC line - was not only possible for a company of HP's size but also necessary.