The VMEbus64X specification is the latest in a long line of enhancements to the original, and highly successful, VMEbus specification which dates back to the early 1980's.
Multiplexing of the Address and Data lines expands the original 32-bit bus to give a significant increase in the data bandwidth available. Support for 3.3V logic, Geographical addressing and support for hot-swapping of cards provides a robust specification for a wide variety of applications.
The 5-row, 160-pin, connectors used permit the additional signal functions and improve the power distribution deficiencies of the earlier specification. Coupled with the optional 95-pin P0 connector, a significant increase in I\O signal pins are available through the backplane.
Integrated Backplanes Solutions Limited provide a broad range of product in 3U, 6U and enhanced 7U form factors in slot widths from three to twenty one.
"Modified Standard" products are extremely popular, utilising the additional I\O pins to provide a custom interconnect for specific applications.