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In VMEbus parlance, it's the P0 connector; in Compact PCI lingo, it's the third connector. And in some people's minds, it's part of a scheme for marrying the two buses in hybrid-backplane systems that will dance to the tune of future application needs.
The P0 connector, placed between the familiar P1 and P2 connectors of the VMEbus, has been in definition for some time by the VMEbus International Trade Association (VITA) Standards Organization as part of a suite of extensions known as the VME64 enhancements. The exact functions to be implemented on the high-density, 2-mm connector (IEC 1076), borrowed from the telecommunications world, have varied as the VME spec has evolved. Its ultimate definition has now become politicized, however, by what some view as a clash-and others a convergence-between VME and Compact PCI.
Compact PCI originator Ziatech Corp. showed up at...