\begin{itemize}
    \item \textbf{Name} : DpgenRom4 -- 4 words ROM Macro-Generator
    \item \textbf{Synopsys} :
\begin{verbatim}
Generate ( 'DpgenRom4', modelname
         , param = { 'nbit'     : n
                   , 'val0'     : constVal0
                   , 'val1'     : constVal1
                   , 'val2'     : constVal2
                   , 'val3'     : constVal3
                   , 'physical' : True                   
                   }
         )
\end{verbatim}
    \item \textbf{Description} : Generates a \verb-n- bits 4 words optimized ROM named \verb-modelname-.
    \item \textbf{Terminal Names} :
    \begin{itemize}
        \item \textbf{sel1} : upper bit of the address of the value (input, 1 bit)
        \item \textbf{sel0} : lower bit of the address of the value (input, 1 bit)
        \item \textbf{q} : the selected word (output, \verb-n- bits)
        \item \textbf{vdd} : power
        \item \textbf{vss} : ground
    \end{itemize}
    \item \textbf{Parameters} : Parameters are given in the map \verb-param-.
    \begin{itemize}
        \item \textbf{nbit} (mandatory) : Defines the size of the generator
        \item \textbf{val0} (mandatory) : Defines the first word
        \item \textbf{val1} (mandatory) : Defines the second word
        \item \textbf{val2} (mandatory) : Defines the third word
        \item \textbf{val3} (mandatory) : Defines the fourth word
        \item \textbf{physical} (optional, default value : False) : In order to generate a layout        
    \end{itemize}
    \item \textbf{Behavior} :
\begin{verbatim}
q <= WITH sel1 & sel0 SELECT constVal0  WHEN B"00",
                             constVal1  WHEN B"01",
                             constVal2  WHEN B"10",
                             constVal3  WHEN B"11";
\end{verbatim}
    \item \textbf{Example} :
\begin{verbatim}
from stratus import *

class inst_rom4 ( Model ) :

  def Interface ( self ) :
    self.sel0 = SignalIn  (    "sel0", 1 )
    self.sel1 = SignalIn  (    "sel1", 1 )
    self.q    = SignalOut ( "dataout", 4 )
    
    self.vdd = VddIn ( "vdd" )
    self.vss = VssIn ( "vss" )
    
  def Netlist ( self ) :
    Generate ( 'DpgenRom4', 'rom4_0b1010_0b1100_0b1111_0b0001'
             , param = { 'nbit'     : 4
                       , 'val0'     : "0b1010"
                       , 'val1'     : "0b1100"
                       , 'val2'     : "0b1111"
                       , 'val3'     : "0b0001"
                       , 'physical' : True
                       }
             )      
    self.I = Inst ( 'rom4_0b1010_0b1100_0b1111_0b0001', 'inst'
                  , map = { 'sel0' : self.sel0
                          , 'sel1' : self.sel1
                          , 'q'    : self.q
                          , 'vdd'  : self.vdd
                          , 'vss'  : self.vss
                          }
                  )
  
  def Layout ( self ) :
    Place ( self.I, NOSYM, Ref(0, 0) )
\end{verbatim}
\end{itemize}
