Warning: this is an htmlized version!
The original is here, and
the conversion rules are here.
% 2015dec06
% See: (find-LATEX "istanbuldefs.tex")
%      (find-LATEXfile "2015-1-GA-P2-gabarito.tex" "\\catcode")
% I use this when I am pissed off with inputenc and friends...
% Usage:
%   \input edrxaccents % (find-LATEX "edrxaccents.tex")

% (find-ist "defs.tex")
\catcode`á=13 \defá{\'a}
\catcode`é=13 \defé{\'e}
\catcode`í=13 \defí{\'\i}
\catcode`ó=13 \defó{\'o}
\catcode`ú=13 \defú{\'u}
\catcode`Á=13 \defÁ{\'A}
\catcode`É=13 \defÉ{\'E}
\catcode`Í=13 \defÍ{\'I}
\catcode`Ó=13 \defÓ{\'O}
\catcode`Ú=13 \defÚ{\'U}

\catcode`à=13 \defà{\`a}
\catcode`è=13 \defè{\`e}
\catcode`ì=13 \defì{\`\i}
\catcode`ò=13 \defò{\`o}
\catcode`ù=13 \defù{\`u}
\catcode`À=13 \defÀ{\`A}
\catcode`È=13 \defÈ{\`E}
\catcode`Ì=13 \defÌ{\`\I}
\catcode`Ò=13 \defÒ{\`O}
\catcode`Ù=13 \defÙ{\`U}

\catcode`â=13 \defâ{\^a}
\catcode`ê=13 \defê{\^e}
\catcode`î=13 \defî{\^\i}
\catcode`ô=13 \defô{\^o}
\catcode`û=13 \defû{\^u}
\catcode`Â=13 \defÂ{\^A}
\catcode`Ê=13 \defÊ{\^E}
\catcode`Î=13 \defÎ{\^\I}
\catcode`Ô=13 \defÔ{\^O}
\catcode`Û=13 \defÛ{\^U}

\catcode`ã=13 \defã{\~a}
\catcode`õ=13 \defõ{\~o}
\catcode`Ã=13 \defÃ{\~A}
\catcode`Õ=13 \defÕ{\~O}

\catcode`ç=13 \defç{\c c}
\catcode`Ç=13 \defÇ{\c C}

% Local Variables:
% coding: utf-8-unix
% End: