字节场位头是否逃离了其小页面？

Question

在一个大得多的文档的一小部分中，我正在使用 minipage 构建一个穷人的两列布局，但运行时间很短。但是，右列字节字段的位头似乎正在逃离其 minipage，我不明白为什么？

梅威瑟：

\documentclass{article}
\usepackage[layout=letterpaper,margin=1in]{geometry}

\usepackage{rotating}
\usepackage[endianness=big]{bytefield}
\begin{document}

\subsection{Functional Unit Addresses}
This section describes\ldots

\subsubsection{{\tt 0b1000}: CTR Layer (Registers)}

\begin{tabular}{r l}
  Address    & Function (32~bit Data) \\ \hline
  \tt 0b0XX0 & Non-INT Register (\#0 -- \#3) \\
  \tt 0b1XX0 & INT Register (and wake) (\#0 -- \#3) \\
\end{tabular}

\bigskip\noindent
\begin{minipage}{\linewidth}
\begin{minipage}{.5\linewidth}
\subsubsection{{\tt 0b1010}: CTR Layer (DMA)}

\begin{tabular}{r l}
  Address    & Function (32~bit Data) \\ \hline
  \tt 0b1000 & DMA Data \\
  \tt 0b1010 & {\em DMA Control Message} \\
\end{tabular}

\subsubsection{{\tt 0b1001}: DSP Layer (Registers)}

\begin{tabular}{r l}
  Address    & Function (32~bit Data) \\ \hline
  \tt 0b0000 & Reg 0: Status Register \\
  \tt 0b0010 & Reg 1: General Purpose \\
  \tt 0b0100 & Reg 2: General Purpose \\
  \tt 0b0110 & Reg 3: General Purpose \\
  \tt 0b1000 & DMA Data \\
  \tt 0b1010 & {\em DMA Control Message} \\
  \tt 0b1100 & 32 bit data for CPU (IRQ0) \\
  \tt 0b1110 & 32 bit data for CPU (IRQ1) \\
\end{tabular}
\end{minipage}
\begin{minipage}{.5\linewidth}

{\bf DMA Control Message}:

\bigskip
\begin{bytefield}[bitwidth=1.5em,bitheight=3em]{16}
  \bitheader{16-31} \\
  \bitbox{1}{\begin{sideways}{\tiny TX RQ}\end{sideways}}
  \bitbox{1}{\begin{sideways}{\tiny RX RQ}\end{sideways}}
  \bitbox{1}{\begin{sideways}{\tiny DONE}\end{sideways}}
  \bitbox{13}{\# of words (TX RQ)}
  \\
  \bitheader{0-15} \\
  \bitbox{2}{\tiny TX Dest}
  \bitbox{14}{Start word addr}
\end{bytefield}
{\em TX Dest:} 00 DSP, 01 R-SRAM, 10 RF, 11 Imager
\end{minipage}
\end{minipage}


\end{document}

第 31-16 位的位头不应该位于左列...：

Answer 1

您必须知道bytefield什么是最低有效位；两列格式与此无关。

\documentclass{article}
\usepackage[layout=letterpaper,margin=1in]{geometry}

\usepackage{rotating}
\usepackage[endianness=big]{bytefield}

\begin{document}
\begin{bytefield}[bitwidth=1.5em,bitheight=3em]{16}
  \bitheader[lsb=16]{16-31} \\
  \bitbox{1}{\begin{sideways}{\tiny TX RQ}\end{sideways}}
  \bitbox{1}{\begin{sideways}{\tiny RX RQ}\end{sideways}}
  \bitbox{1}{\begin{sideways}{\tiny DONE}\end{sideways}}
  \bitbox{13}{\# of words (TX RQ)}
  \\
  \bitheader{0-15} \\
  \bitbox{2}{\tiny TX Dest}
  \bitbox{14}{Start word addr}
\end{bytefield}
\end{document}