% pdcadobe.dtx -- documentation & source for pdcadobe.tex -*-tex-*-
        
%%%@TeX-document-file {
%%% title 	= "PDCADOBE -- Formatting Macros",
%%% filename 	= "$texmf/doc/plain/pdcmac/pdcadobe.dtx",
%%% version 	= "$Revision: 1.3 $",
%%% package 	= "pdcmac 1.0",
%%% date 	= "$Date: 1995/03/30 16:07:31 $",
%%% author	= "P. Damian Cugley",
%%% email	= "damian.cugley@comlab.ox.ac.uk",
%%% address	= "Oxford University Computing Laboratory,"
%%%                Parks Road, Oxford  OX1 3QD, UK",
%%% abstract	= "This document describes and is the source code for 
%%%                the TeX definitions file pdcadobe.tex.
%%%                Running plain TeX on this file produces both the
%%%                definitions file and the printed documentation.",
%%% copyright	= "Copyright (c) 1995 P. Damian Cugley",
%%% copying	= "This program is free software; you can redistribute
%%%		   it and/or modify it under the terms of the GNU
%%%		   General Public License as published by the Free
%%%		   Software Foundation; either version 2 of the License,
%%%		   or (at your option) any later version.",
%%% notice	= "This program is distributed in the hope that it will
%%%		   be useful, but WITHOUT ANY WARRANTY; without even the
%%%		   implied warranty of MERCHANTABILITY or FITNESS FOR A
%%%		   PARTICULAR PURPOSE.  See the GNU General Public
%%%		   License for more details.",
%%% notice	= "You should have received a copy of the GNU General
%%%		   Public License along with this program; if not, write
%%%		   to the Free Software Foundation, Inc., 675 Mass Ave,
%%%		   Cambridge, MA 02139, USA.",
%%% codetable	= "USASCII",
%%% dependencies = "pdccode.tex"
%%%}

%{{{ pdcadobe
%{{{  preamble
\relax
\input pdccode

\document
\rcs$Id: pdcadobe.dtx,v 1.3 1995/03/30 16:07:31 pdc Exp $\endrcs

\codefile{pdcadobe.tex}
%}}}  preamble
%{{{  introduction
	
\author{P. Damian Cugley}
\title{PDCAdobe---Macros for using Adobe fonts}
\section{Introduction}
	
	This document describes |pdcadobe.tex|, a collection of macros
	for using Adobe's Standard Roman character set, via DVIPS's
	variation on the \TeX\ Text encoding.  

\notepar
	You will need to use a different strategy if your PostScript
	fonts adhere strictly to the \TeX\ Text conventions (the
	conventions of Computer Modern Roman, described in {\it\TeX
	book}\/ Appendix~F, and called OT1 by the \LaTeX~3 team), such
	as the fonts generated with Fontinst.
\endnotepar

\subsec{New text symbols}

	The new characters now available in text are:
$$\halign{\indent\tt\char`\\#1\hfil&\quad#\hfil\cr
	quotesingle&	typewriter-style apostrophe ({\tt\char"0D })\cr
	quotedouble&	typewriter-style double apostrophe ({\tt"})\cr
	asciicircum&	ASCII circumflex\cr
	asciitilde&	ASCII tilde\cr
}$$	 


\subsec{Use of the Symbol font}

	The assumption is that one of the resons for using PostScript
	fonts is that, if you stick to the `Adobe~35', the resulting
	PostScript files are much smaller because no font bitmaps need
	to be downloaded.  On this assumption, Adobe's Symbol font is
	used whenever possible, even when the Computer Modern symbol is
	arguably prettier.

	The Symbol font will need to have its own maths family, which by
	convention this file expects to find defined as |\asyfam|.

\subsec{Composite letters}

\setbox0=\hbox{accent}
\edef\\{\vrule height\the\ht0 depth\the\dp0 width\the\wd0 \relax }

	Composite letters are those made from some base letter and a
	{\it mark}, for example {\it\'e}, {\it\"u}.\footnote*{`Composite
	letters' is a euphemism for what English speakers usually refer
	to as `\\ed letters', since the word `\\' tends to provoke
	lectures to the effect that composite letters are not considered
	to be `\\ed' in many of the lanuages in which they are used.}
	In the Adobe Standard Roman character set, and hence in
	|afm2tfm|'s encoding, the composite letters of ISO 8859--1 are
	included as separate glyphs.  These glyphs are accessed using
	ligatures between mark glyphs and base letters (so that |^^13e|
	in the manuscript file produces `\'e').  Unfortunately,
	exploiting this is tricky if we also want to allow for composite
	glyphs {\it not} included in the PostScript fonts.

	The approach taken in these definitions is that \TeX's composite
	letter commands (|\'|, |\"|, and friends) are left unchanged, so
	that `|\'e|' works through \TeX's |\|\\ command.  The magic
	glyphs are available as commands with names like |\acuteglyph|
	or via the Latin-1 special symbols, so that `|\acuteglyph e|' or
	`|^^b4e|' (which might liik like `{\tt\char"13 e}' on the screen
	if your computer uses Latin-1) produces `\'e' as a single glyph
	(which might mean tha mark is better aligned).  Finally, the
	Latin-1 composite letters generate the single glyphs vial
	ligatures, so that `|^^e9|' (which may well look like `{\tt\'e}'
	on the screen) expands to `|\acuteglyph e|' and hence `\'e'.

\subsec{About this document}

	The definitions file and the printed documentation are both in
	|pdcadobe.dtx|, a `documented \TeX\ macros' file\footnote*{The
	\LaTeX~2e distribution uses files with the `|dtx|' suffix for
	similar purposes.}  which, when processed by plain \TeX,
	generates a fresh copy of |pdcadobe.tex| in the current directory
	in addition to the |dvi| file.  This ensures that the printed
	documentation and the code it describes are identical.  The
	|dtx| file uses the macros in |pdccode.tex|.

%}}}  introduction
%{{{  File identification
\section{File identification}
	
	Nowadays, macro files start with some comments identifying the
	file.

\code
	\|\% pdcadobe.tex \fileversion~\filedate~-- macros for Adobe style fonts
	|
	|%%%@TeX-definition-file {
	|%%% filename       = "$texmf/tex/plain/pdcmac/pdcadobe.tex",
	\|\%\%\% version~~~~~~~~= "\fileversion",
	\|\%\%\% date~~~~~~~~~~~= "\filedate",
	|%%% package        = "pdcmac 1.0",
	|%%% author         = "P. Damian Cugley",
	|%%% email          = "damian.cugley@comlab.ox.ac.uk",
	|%%% address        = "Oxford University Computing Laboratory,
	|%%%                   Parks Road, Oxford  OX1 3QD, UK",
	|%%% codetable      = "USASCII",
	|%%% keywords       = "TeX, plain TeX, macros",
	|%%% supported      = "Maybe",
	|%%% abstract       = "Formatting macros for Adobe-style fonts.
	|%%%                   This file was generated by running
	\|\%\%\%~~~~~~~~~~~~~~~~~~~plain TeX on \jobname.dtx",
	|%%% copyright      = "Copyright (c) 1991-1995 P. Damian Cugley",
	|%%% copying        = "DO NOT DISTRIBUTE THIS FILE.
	\|\%\%\%~~~~~~~~~~~~~~~~~~~Distribute \jobname.dtx only as part of the
	|%%%                   package it came in.",
	|%%% dependencies   = "",
	|%%% }
	|
	\|\\message\{\fileversion~<pdc \filedate>\}
	|
\endcode
%}}}  file id
%{{{  chardefs
\section{Characters available in all styles}

	The following characters are in the fonts generated by
	|afm2tfm|, so are available in all styles.
\code
	|\chardef\quotesingle="0D
	|\chardef\quotedouble="22
	|\chardef\_="5F
	|\chardef\asciicircum="80
	|\chardef\asciitilde="81
	|\chardef\cents="A2
	|\chardef\pounds="A3
	|\chardef\fractionslash="A4
	|\chardef\yen="A5
	|\chardef\florin="A6
	|\chardef\S="A7
	|\chardef\currency="A8
	|\chardef\lguillemet="AB
	|\chardef\dag="B2
	|\chardef\ddag="B3
	|\chardef\gbdecimal="B4
	|\chardef\P="B6
	|\chardef\bullet="B7
	|\chardef\quotesinglebase="B8
	|\chardef\quotedblbase="B9
	|\chardef\rguillemet="BB
	|\chardef\ellipsis="BC \def\dots{\ellipsis\thinspace}
	|\chardef\permille="BD
	|\chardef\orda="E3
	|\chardef\ordo="EB
\endcode
	Some glyphs, like |\fractionslash| and |\gbdecimal| may well be
	used in maths mode, but are defined using |\chardef| to allow
	them to be used in text as well.

	The definition of |\dots| adds the thin space that is included
	in plain \TeX's |\dots|, so that `|\dots,|' will have a thin
	space between the third full stop and the comma.

\subsec{Maths stuff}

	These symbols are available in maths mode, coming from the |\rm|
	font (fam~0).
\code
	|\mathchardef\backslash="205C
	|\edef\lbrace{\delimiter"407B308} \let\{=\lbrace \mathcode`\{="407B
	|\mathcode`\|="707C 	\mathchardef\mid="307C
	|\edef\rbrace{\delimiter"507D309} \let\}=\rbrace \mathcode`\}="507D
	|\mathchardef\sim="3081
	|\mathchardef\cdot="20B4
	|\mathchardef\bullet="20B7
	|\mathchardef\ldots="60BC
\endcode
	There {\it are} extensible braces in the Adobe Symbol font,
	which I~would have used for the |\lbrace| and |\rbrace|
	commands.  Unfortunately, the TFM file generated with |afm2tfm|
	seems to lack the special information that makes extensible
	characters work, so the |cmex10| glyphs must be used instead.

\subsec{Marks for composite letters}

	Some common accented letters can be got by printing the accent
	glyph before the letter glyph.  However not all combinations
	will work, so I~have left plain \TeX's definitions in place.

	For later reference, the glyphs used for the accents are given
	names.
\code
	|\chardef\graveglyph="12
	|\chardef\acuteglyph="13
	|\chardef\hookglyph="14
	|\chardef\breveglyph="15
	|\chardef\macronglyph="16
	|\chardef\ringglyph="17
	|\chardef\cedillaglyph="18
	|\chardef\circumglyph="5E
	|\chardef\tildeglyph="7E
	|\chardef\twodotsglyph="7F
	|\chardef\dotglyph="C7
	|\chardef\hungarianglyph="CD
	|\chardef\ogonekglyph="CE
\endcode
	

	Some special letters and marks have been moved to new slots.
\code
	|\chardef\AA="C8 \chardef\aa="98
	|\chardef\L="E8 \chardef\l="F8
	|\def\.#1{\accent\dotglyph #1}
	|\def\H#1{\accent\hungarianglyph"CD #1}
\endcode

%}}}  chardefs
%{{{  adobe sy
\section{Adobe Symbol font characters}

	Most of Adobe's Symbol font's glyphs exist already in one of the
	maths fonts.  Nevertheless I~think it makes sense to use them
	whenever possible, because if it so happens that none of the
	glyphs in the maths fonts are used, the bitmaps for the fonts
	may be omitted from the PostScript file, making it much smaller.
	For these definitions to work, there must be a family |\asyfam|
	and font nickname |\asy|.

\code
	|\ifx\asyfam\UNDEFINED 
	|    \newfam\asyfam 
	|\fi
\endcode

\subsec{Extracting the fam name}

\code
	|\edef\\{\ifcase\asyfam 0\or 1\or 2\or 3\or 4\or 5\or 6\or 7\or
	|    8\or 9\or A\or B\or C\or D\or E\or F\fi
	|}
\endcode

	Where plain \TeX's definition uses glyphs from the roman font,
	I~have let the definition stand.
\code
	|\mathchardef\forall="0\\22
	|\mathchardef\exists="0\\24
	|\mathchardef\suchthat="0\\27
	|\mathcode`*="2\\2A
	|\mathcode`,="6\\2C
	|\mathcode`-="2\\2D
	|\mathcode`.="2\\2E
	|\mathcode`/="2\\2F
	|\mathcode`<="3\\3C
	|\mathcode`>="3\\3E
\smallbreak
	|\mathchardef\cong="3\\40
	|\mathchardef\Alpha="0\\41
	|\mathchardef\Beta="0\\42
	|\mathchardef\Chi="0\\43
	|\mathchardef\Delta="0\\44
	|\mathchardef\Epsilon="0\\45
	|\mathchardef\Phi="0\\46
	|\mathchardef\Gamma="0\\47
	|\mathchardef\Eta="0\\48
	|\mathchardef\Iota="0\\49
	|\mathchardef\vartheta="0\\4A
	|\mathchardef\Kappa="0\\4B
	|\mathchardef\Lambda="0\\4C
	|\mathchardef\Mu="0\\4D
	|\mathchardef\Ni="0\\4E
	|\mathchardef\Omicron="0\\4F
\smallbreak
	|\mathchardef\Pi="0\\50
	|\mathchardef\Theta="0\\51
	|\mathchardef\Rho="0\\52
	|\mathchardef\Sigma="0\\53
	|\mathchardef\Tau="0\\54
	|\mathchardef\varUpsilon="0\\55
	|\mathchardef\varsigma="0\\56
	|\mathchardef\Omega="0\\57
	|\mathchardef\Xi="0\\58
	|\mathchardef\Psi="0\\59
	|\mathchardef\Zeta="0\\5A
%
	|\mathchardef\therefore="3\\5C
%
	|\mathchardef\perp="3\\5E
%
\smallbreak
%
	|\mathchardef\alpha="0\\61
	|\mathchardef\beta="0\\62
	|\mathchardef\chi="0\\63
	|\mathchardef\delta="0\\64
	|\mathchardef\epsilon="0\\65
	|\mathchardef\phi="0\\66
	|\mathchardef\gamma="0\\67
	|\mathchardef\eta="0\\68
	|\mathchardef\iota="0\\69
	|\mathchardef\varphi="0\\6A
	|\mathchardef\kappa="0\\6B
	|\mathchardef\lambda="0\\6C
	|\mathchardef\mu="0\\6D
	|\mathchardef\ni="0\\6E
	|\mathchardef\omicron="0\\6F
\smallbreak
	|\mathchardef\pi="0\\70
	|\mathchardef\theta="0\\71
	|\mathchardef\rho="0\\72
	|\mathchardef\sigma="0\\73
	|\mathchardef\tau="0\\74
	|\mathchardef\upsilon="0\\75
	|\mathchardef\varpi="0\\76
	|\mathchardef\omega="0\\77
	|\mathchardef\xi="0\\78
	|\mathchardef\psi="0\\79
	|\mathchardef\zeta="0\\7A
	|\mathchardef\sim="3\\7E
%
\smallbreak
	|\mathchardef\Upsilon="0\\A1
	|\mathcode`'="0\\A2 \mathchardef\minutes="0\\A2
	|\mathchardef\leq="3\\A3 \let\le=\leq
	|\mathchardef\fractionslash="0\\A4
	|\mathchardef\infinity="0\\A5
%
	|\mathchardef\clubsuit="0\\A7
	|\mathchardef\diamondsuit="0\\A8
	|\mathchardef\heartsuit="0\\A9
	|\mathchardef\spadesuit="0\\AA
	|\mathchardef\leftrightarrow="3\\AB
	|\mathchardef\leftarrow="3\\AC \let\gets=\rightarrow
	|\mathchardef\uparrow="3\\AD
	|\mathchardef\rightarrow="3\\AE \let\to=\rightarrow
	|\mathchardef\downarrow="3\\AF
\smallskip
	|\mathchardef\degrees="0\\B0
	|\mathchardef\pm="2\\B1
	|\mathchardef\seconds="0\\B2
	|\mathchardef\geq="3\\B3 \let\ge=\geq
	|\mathchardef\times="2\\B4
	|\mathchardef\propto="3\\B5
	|\mathchardef\partial="0\\B6
%
	|\mathchardef\div="2\\B8
	|\mathchardef\neq="3\\B9 \let\ne=\neq
	|\mathchardef\equiv="3\\BA
	|\mathchardef\approx="3\\BB
	|\mathchardef\ldots="6\\BC
	|\edef\arrowvert{\delimiter"0\\BD33C }
	|\mathchardef\relbar"3\\BE
	|\edef\crlf{\noexpand\mathexbox\\BF}
\smallbreak
	|\mathchardef\aleph="0\\C0
	|\mathchardef\Im="0\\C1
	|\mathchardef\Re="0\\C2
	|\mathchardef\wp="0\\C3
	|\mathchardef\otimes="2\\C4
	|\mathchardef\oplus="2\\C5
	|\mathchardef\emptyset="0\\C6
	|\mathchardef\cap="2\\C7
	|\mathchardef\cup="2\\C8
	|\mathchardef\supset="3\\C9
	|\mathchardef\supseteq="3\\CA
	|\mathchardef\nsubset="3\\CB
	|\mathchardef\subset="3\\CC
	|\mathchardef\subseteq="3\\CD
	|\mathchardef\in="3\\CE
	|\mathchardef\nin="3\\CF
\smallbreak
	|\mathchardef\angle="0\\D0
	|\mathchardef\nabla="0\\D1
	|\edef\registered{\noexpand\mathhexbox\\D2}
	|\edef\copyright{\noexpand\mathhexbox\\D3}
	|\edef\trademark{\noexpand\mathhexbox\\D4}
	|\mathchardef\prod="1\\D5
	|\edef\sqrt{\radical"\\D6370 }
	|\mathchardef\cdot="2\\D7
	|\mathchardef\neg="0\\D8 \let\lnot=\neg
	|\mathchardef\wedge="3\\D9 \let\land=\wedge
	|\mathchardef\vee="3\\DA \let\lor=\vee
	|\mathchardef\Leftrightarrow="3\\DB
	|\mathchardef\Leftarrow="3\\DC
	|\mathchardef\Uparrow="3\\DD
	|\mathchardef\Rightarrow="3\\DE
	|\mathchardef\Downarrow="3\\DF
\smallbreak
	|\mathchardef\diamond="3\\E0
	|\edef\langle{\delimiter"4\\E130A }
	|\mathchardef\sum="1\\E5
	|\edef\rangle{\delimiter"5\\F130B }
\endcode
	(I haven't bothered redefining those delimiters based on parts of
	large delimiters.)
	
%}}}  adobe sy
%{{{  ISO 8859-1 support
\section{ISO 8859--1 input}

	ISO~8859--1 (Latin-1) is the de facto standard character
	encoding in a large numebr of countries, and so we shall try to
	make a reasonable number of Latin-1 characters available.

\subsec{Symbols}

	Those characters whose code is the same as the code of the
	corresponding glyph are left alone (with catcode~12).  For
	example, |^^a3| (pounds sterling) is left alone.

	Those that have an equivalent |\chardef| (or |\mathchardef|)
	name are defined with |\let| (for example, |^^a4| is |\let| to
	|\currency|).  Those with an equivalent standard ligature use
	that ligature.  These conventions hopefully insulate these
	definitions against changes in the encoding.

	The characters that represent marks for composite
	letters\footnote*{This phrase is used on the grounds that the
	word {\it accent} tends to provoke lectures on ways in which
	many composite letters do {\it not} represent accents in the
	languages in which they are used.} will form ligatures with the
	following letter---one may write `{\tt\char"7F u\char"18 c}' to
	get `\"u\c c'.

	I don't use |\declareactivechar| on these because they would not
	work properly in verbatim text with catcode~12.  (Extending
	verbatim text to include Latin-1 will take a few definitions
	along the same lines as |\ttlq| etc.).
\code
	|\catcode`^^a0\active \let^^a0=~
	|\catcode`^^a1\active \def^^a1{!`}
% 	A2
%	A3	
	|\catcode`^^a4\active \let^^a4=\currency
%	A5
%	A6 XXX
% 	A7
	|\catcode`^^a8\active \let^^a8=\twodotsglyph
	|\catcode`^^a9\active \let^^a9=\copyright
	|\catcode`^^aa\active \let^^aa=\orda
%	AB
	|\catcode`^^ac\active \let^^ac=\lnot
	|\catcode`^^ad\active \let^^ad=\-
	|\catcode`^^ae\active \let^^ae=\registered
	|\catcode`^^af\active \let^^af=\macronglyph
\smallbreak
	|\catcode`^^b0\active \let^^b0=\degrees
	|\catcode`^^b1\active \let^^b1=\pm
	|\catcode`^^b2\active \def^^b2{^2}
	|\catcode`^^b3\active \def^^b3{^3}
	|\catcode`^^b4\active \let^^b4=\acuteglyph
	|\catcode`^^b5\active \let^^b5=\mu
%	B6
	|\catcode`^^b7\active \let^^b7=\gbdecimal
	|\catcode`^^b8\active \let^^b8=\cedillaglyph
	|\catcode`^^b9\active \def^^b9{^1}
	|\catcode`^^ba\active \let^^ba=\ordo
%	BB
	|\catcode`^^bc\active \def^^bc{\frac14}
	|\catcode`^^bd\active \def^^bd{\frac12}
	|\catcode`^^be\active \def^^be{\frac34}
	|\catcode`^^bf\active \def^^bf{?`}
\smallbreak	
	|\catcode`^^d7\active \let^^d7=\times
	|\catcode`^^f7\active \let^^f7=\div
\endcode

\subsec{Composite letters}

	The composite letters acer accessed via ligatures so that they
	are immune to some possible changes in encoding.
\code
	|\catcode`^^c0\active \def^^c0{\graveglyph A}
	|\catcode`^^c1\active \def^^c1{\acuteglyph A}
	|\catcode`^^c2\active \def^^c2{\circumglyph A}
	|\catcode`^^c3\active \def^^c3{\tildeglyph A}
	|\catcode`^^c4\active \def^^c4{\twodotsglyph A}
	|\catcode`^^c5\active \def^^c5{\ringglyph A}
	|\catcode`^^c6\active \let^^c6=\AE
	|\catcode`^^c7\active \def^^c7{\cedillaglyph C}
	|\catcode`^^c8\active \def^^c8{\graveglyph E}
	|\catcode`^^c9\active \def^^c9{\acuteglyph E}
	|\catcode`^^ca\active \def^^ca{\circumglyph E}
	|\catcode`^^cb\active \def^^cb{\twodotsglyph E}
	|\catcode`^^cc\active \def^^cc{\graveglyph I}
	|\catcode`^^cd\active \def^^cd{\acuteglyph I}
	|\catcode`^^ce\active \def^^ce{\circumglyph I}
	|\catcode`^^cf\active \def^^cf{\twodotsglyph I}
\smallbreak
%	|\catcode`^^d0\active \chardef^^d0="?? %  DH
	|\catcode`^^d1\active \def^^d1{\tildeglyph N}
	|\catcode`^^d2\active \def^^d2{\graveglyph O}
	|\catcode`^^d3\active \def^^d3{\acuteglyph O}
	|\catcode`^^d4\active \def^^d4{\circumglyph O}
	|\catcode`^^d5\active \def^^d5{\tildeglyph O}
	|\catcode`^^d6\active \def^^d6{\twodotsglyph O}
	|\catcode`^^d8\active \let^^d8=\O
	|\catcode`^^d9\active \def^^d9{\graveglyph U}
	|\catcode`^^da\active \def^^da{\acuteglyph U}
	|\catcode`^^db\active \def^^db{\circumglyph U}
	|\catcode`^^dc\active \def^^dc{\twodotsglyph U}
	|\catcode`^^dd\active \def^^dd{\acuteglyph Y}
%	|\catcode`^^de\active \def^^de{TH}
	|\catcode`^^df\active \let^^df=\ss
\smallbreak
        |\catcode`^^e0\active \def^^e0{\acuteglyph a}
	|\catcode`^^e1\active \def^^e1{\graveglyph a}
	|\catcode`^^e2\active \def^^e2{\circumglyph a}
	|\catcode`^^e3\active \def^^e3{\tildeglyph a}
	|\catcode`^^e4\active \def^^e4{\twodotsglyph a}
	|\catcode`^^e5\active \def^^e5{\ringglyph a}
	|\catcode`^^e6\active \let^^e6=\ae
	|\catcode`^^e7\active \def^^e7{\cedillaglyph c}
	|\catcode`^^e8\active \def^^e8{\graveglyph e}
	|\catcode`^^e9\active \def^^e9{\acuteglyph e}
	|\catcode`^^ea\active \def^^ea{\circumglyph e}
	|\catcode`^^eb\active \def^^eb{\twodotsglyph e}
	|\catcode`^^ec\active \def^^ec{\graveglyph i}
	|\catcode`^^ed\active \def^^ed{\acuteglyph i}
	|\catcode`^^ee\active \def^^ee{\circumglyph i}
	|\catcode`^^ef\active \def^^ef{\twodotsglyph i}
\smallbreak
%	|\catcode`^^f0\active \def^^f0{dh}
	|\catcode`^^f1\active \def^^f1{\tildeglyph n}
	|\catcode`^^f2\active \def^^f2{\graveglyph o}
	|\catcode`^^f3\active \def^^f3{\acuteglyph o}
	|\catcode`^^f4\active \def^^f4{\circumglyph o}
	|\catcode`^^f5\active \def^^f5{\tildeglyph o}
	|\catcode`^^f6\active \def^^f6{\twodotsglyph o}
	|\catcode`^^f8\active \let^^f8=\o
	|\catcode`^^f9\active \def^^f9{\graveglyph u}
	|\catcode`^^fa\active \def^^fa{\acuteglyph u}
	|\catcode`^^fb\active \def^^fb{\circumglyph u}
	|\catcode`^^fc\active \def^^fc{\twodotsglyph u}
	|\catcode`^^fd\active \def^^fd{\acuteglyph y}
%	|\catcode`^^fe\active \def^^fe{th}
	|\catcode`^^ff\active \def^^ff{\twodotsglyph y}
\endcode

%}}}  ISO 8859-1 support
%{{{  other hacks
\section{Modifications to other PDCMAC macros}


	For typewriter text, less drastic revision of the string is
	necessary. 
\code
	|\def\ttminus{--{}}
	|\let\ttcircum=\asciicircum
	|\let\tttilde=\asciitilde
\endcode
	Note that ASCII quote and backquote characters are still got
	from accents because a `neutral' quotation mark is not adequate
	for computer listings where both sorts of `quote mark' might be
	appear, with different meanings.

	
%}}}  other hacks
\endcodefile
\enddocument
\bye
%}}} pdcadobe.dtx

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%End: