Xilinx 8.2i manual Vhdl, Vital, Wire, Xtclsh

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VHDL

VHDL is an acronym for VHSIC Hardware Description Language (VHSIC an acronym for Very High-Speed Integrated Circuits). It can be used to describe the concurrent and sequential behavior of a digital system at many levels of abstraction ranging from the algorithmic level to the gate level. VHDL is IEEE standard 1076-1993.

A VHDL file has a .vhd or .vhdl extension.

VITAL

VITAL is an acronym for VHDL Intitiative Toward ASIC Libraries. It is a VHDL-library standard (IEEE 1076.4) that defines standard constructs for simulation modeling, accelerating, and improving the performance of VHDL simulators.

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wire

A wire is a net or a signal. See net.

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xtclsh

Xilinx Tcl Shell (xtclsh), which presents the xtclsh prompt used for running scripts and using the Xilinx Tcl commands.

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