% byf.tex/byf1.lib
% superset of kdoc.lib


% Macros for displaying fragmentized machine words
%
% Accumulates the "boxes" in box register 10; accumulates the
% bit numbers in box register 11.  Box register 12 is used as
% a temporary.

\font\bitnumfont=cmr7
\def\startbyf{
  \setbox10=\hbox{\vrule height12pt depth4pt}
  \setbox11=\hbox{}
  }
\def\byf#1#2#3{
  \dimen10=#1pt
  \dimen11=#2pt
  \advance\dimen10 by -\dimen11
  \advance\dimen10 by 1pt
  \multiply\dimen10 by 12
%  \showthe\dimen10
  \setbox12=\hbox to \dimen10{\hfil{#3}\hfil}
  \setbox10=\hbox{\box10\vrule\box12}
  \setbox12=\hbox to \dimen10{\bitnumfont\kern1pt{#1}\hfil{#2}\kern1pt}
  \setbox11=\hbox{\box11\kern0.4pt\box12}
  }
\def\bif#1#2{
  \setbox12=\hbox to 12pt{\hfil{#2}\hfil}
  \setbox10=\hbox{\box10\vrule\box12}
  \setbox12=\hbox to 12pt{\bitnumfont\hfil{#1}\hfil}
  \setbox11=\hbox{\box11\box12}
  }
\def\endbyf{
  \setbox10=\hbox{\box10\vrule}
  \setbox11=\hbox{\box11\kern0.4pt}
  \setbox10=\vbox{\hrule\box10\hrule}
  }
\def\byfbox{
  \copy10
  }
\def\byfnumbers{
  \copy11
  }

% \startbyf
% \bif{32}    {1}
% \byf{31}{26}{Data Type}
% \byf{25}{24}{00}
% \byf{23}{ 0}{24-bit Two's Complement Value}
% \endbyf
% \line{\hfil\byfbox}
% \line{\byfnumbers\hfil}
% \line{\byfbox\hfil}
% \line{\hfil\byfbox\hfil}
% \line{\hfil\byfnumbers\hfil}
% \vskip 1in
% \line{\hfil\vbox{\byfbox\byfnumbers}}
% \vskip 1in
% \line{\hfil\vbox{\byfnumbers\byfbox}}
% \end