PCI.VHD, THE INTERFACE MODULE WITH PCI AGENT CHIP
--v1.0: For CY7C9689, First Version working on L01A chip
--V2.0: For simplified PCI Agent, Xilinx and AMD chips
DESCRIPTION : BIN to seven segments converter
-- segment encoding
-- a
-- +---+
-- f | | b
-- +---+ <- g
-- e | | c
-- +---+
-- d
-- Enable (EN) active : high
-- Outputs (data_out) active : low
