spec/sm/scanner.tex

   1 \documentclass{minimal}
   2 \pagestyle{empty}
   3
   4 \usepackage{pstricks}
   5 \usepackage{pst-node}
   6
   7 \begin{document}
   8
   9 \begin{psmatrix}[mnode=oval, colsep=2cm, rowsep=2cm]
  10 [mnode=R,name=res]{sys\_res\_n} &
  11 [name=idle]{\shortstack{\textbf{idle}\\bs:=0;\\take:=0;\\do\_it:=0;}} &
  12 [name=take]{\shortstack{\textbf{\"ubernehmen}\\take:=1;\\char:=$b_0$;}} \\
  13 %%
  14 [name=doit]{\shortstack{\textbf{enter}\\do\_it:=1;}} &
  15 &
  16 [name=mod]{\shortstack{\textbf{mod}\\$b_0$:=data;}} \\
  17 %%
  18 &
  19 [name=read]{\shortstack{\textbf{read}\\$b_0$:=data;}} &
  20 [name=bs]{\shortstack{\textbf{l\"oschen}\\backspace:=1;}} \\
  21 \end{psmatrix}
  22
  23 \psset{arrows=->, shortput=nab}
  24
  25 \ncline[linestyle=dotted]{res}{idle}
  26
  27 \ncarc[arcangle=25]{idle}{read}\ncput*[npos=.43]{new\_data$\uparrow$}
  28 \ncarc[arcangle=25]{read}{idle}\ncput*[npos=.43]{ung\"ultiges byte}
  29
  30 \ncarc[arcangle=-25]{read}{bs}\ncput*[npos=.50]{$b_0 = 0x0e$}
  31 \ncarc[arcangle=25]{read}{doit}\ncput*[npos=.50]{$b_0 = 0x1c$}
  32
  33 \ncarc[arcangle=0]{read}{mod}\ncput*[npos=.40]{$b_0 = 0xe0$}
  34 \ncarc[arcangle=-40]{mod}{take}\ncput*[npos=.40]{g\"ultiges zeichen}
  35 \ncarc[arcangle=-25]{mod}{idle}\ncput*[npos=.53]{ung\"ultiges byte}
  36
  37 \ncarc[arcangle=0]{bs}{idle}
  38 \ncarc[arcangle=25]{doit}{idle}\ncput*[npos=.50]{finished\_result$\uparrow$}
  39 \ncarc[arcangle=-25]{take}{idle}
  40 \end{document}