An open process of restandardization, conducted by the IEEE, has led to
the definitions of the new VHDL standard. The changes make VHDL safer,
more portable, and more powerful. VHDL also becomes bigger and more
complete. The canonical simulator of VHDL is enriched by new mechanisms,
the predefined environment is more complete, and the syntax is more
regular and flexible. Discrepancies and known bugs of VHDL'87 have been
fixed. However, the new VHDL'92 is compatible with VHDL'87, with some
minor exceptions.
This book presents the new VHDL'92 for the VHDL designer. New features
ar explained and classified. Examples are provided, each new feature is
given a rationale and its impact on design methodology, and performance
is analysed. Where appropriate, pitfalls and traps are explained.
The VHDL designer will quickly be able to find the feature needed to
evaluate the benefits it brings, to modify previous VHDL'87 code to make
it more efficient, more portable, and more flexible.
VHDL'92 is the essential update for all VHDL designers and managers
involved in electronic design.