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HP-UX 11i Internals by Chris Moore, Chris Cooper

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I/O Framework

Prior to the 10.0 release of HP-UX, there were two distinct families of HP products that used the HP-UX operating system. One was the workstation family, or S700 systems. These systems evolved from the Motorola 68000-based single-user systems. The other family was the server family, or S800 systems. These were the original PA-RISC machines, using the hardware developed for both the HP-UX servers and the for systems running Hewlett-Packard's proprietary operating system MPE.

Over time, the S700 systems were moved to the PA-RISC platform. It became clear that a single operating system that ran on both workstations and servers made good sense. With release 7.0, HP-UX had merged most of the kernel functionality between the two platforms. ...

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