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    24.1. NeXT and Sun

    OpenStep was created in 1993 as a result of a collaboration between Sun and NeXT. The two companies each released an implementation of the specification for their own operating systems. For a while there were two competing OpenStep operating systems for Sun’s SPARC workstations, Solaris with Sun’s OpenStep layer, and NeXT’s OPENSTEP/Mach for SPARC.

    The Sun implementation used the X Display PostScript (XDPS) extension, which allowed OpenStep applications to use DPS drawing functions inside X windows. It also included a daemon that wrapped Mach port operations in Solaris IPC calls, allowing code that depended on Mach ports to work properly.


      

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