Amstex sample cyrillic
Using Cyrillic Text in AmSTeX
Here's a quick example of an AmSTeX file including some Cyrillic text.
\documentstyle{amsppt} \input cyracc.def \catcode`\@=11 \font@\tencyr=wncyr10 \font@\eightcyr=wncyr8 \catcode`\@=13 \addto\tenpoint{\def\cyr{\tencyr\cyracc}} \addto\eightpoint{\def\cyr{\eightcyr\cyracc}} \document English text \dots {\cyr chto-to po-russki} \dots more English text. \enddocument