Riviera-PRO 2008.02 supports many features of the VHDL standard draft (IEEE P1076-2007/D4.0), recently approved by Accellera. Constructs such as new data types, subprograms and operators, matching ...

The 8255A Programmable Peripheral Interface (PPI) implements a general-purpose I/O interface to connect peripheral equipment to a microcomputer system bus. The core’s functional configuration is ...