LaTeX: dvipsでPDFを作る際にﾅﾝﾄｶBoxのサイズを指定する

test-dvips-cropbox.tex

% LaTeX + dvips
\documentclass[a4paper]{article}
\textwidth=250bp \oddsidemargin=-1in \evensidemargin=-1in
\textheight=250bp \topmargin=-1in \headheight=0pt  \headsep=0pt
\AtBeginDvi{%
\special{papersize=250bp 250bp}%
\special{ps:SDict begin
[ /CropBox  [0 0 200 200] /PAGE pdfmark
[ /BleedBox [0 0 150 150] /PAGE pdfmark
[ /TrimBox  [0 0 100 100] /PAGE pdfmark
[ /ArtBox   [0 0 50 50]   /PAGE pdfmark
end}%
}
\begin{document}
\noindent\hbox{}\vfill
\font\fa=ipxm-r-u26 at 196bp
\noindent\fa\raise.12em\hbox{\char3}
\end{document}