\startmodule[math-verbatim]

%definefontfeature[fixedwidth][fixedwidth=0.30]
%definefontfeature[fixedwidth][fixedwidth=0.28]
%definefontfeature[fixedwidth][fixedwidth=0.27]
\definefontfeature[fixedwidth][dimensions={halfmono,scale}]

% \definefontfallback
%   [MonoMathMath]
%   [dejavusansmono.ttf*fixedwidth]
%   [0x0400-0x600][rscale=.8]

\definefontfallback
  [MonoMathMath]
  [cmuntt.otf*fixedwidth]
  [0x0400-0x600]

\definefontfallback
  [MonoMathMath]
  [concrete-math.otf*fixedwidth]
  [0x0600-0x1FFFF]

\definefontsynonym
  [MonoMathBase]
  [lmmono10-regular.otf*fixedwidth]
  [fallbacks=MonoMathMath]

% \definefontfallback
%   [MonoTextMath]
%   [dejavusansmono.ttf*fixedwidth]
%   [0x0400-0x600][rscale=.8]

\definefontfallback
  [MonoTextMath]
  [cmuntt.otf*fixedwidth]
  [0x0400-0x600]

\definefontfallback
  [MonoTextMath]
  [concrete-math.otf]
  [0x0600-0x1FFFF]

\definefontsynonym
  [MonoTextBase]
  [lmmono10-regular.otf]
  [fallbacks=MonoTextMath]

\definefontsynonym
  [MonoMathBaseBold]
  [lmmonolt10-bold.otf*fixedwidth]
  [fallbacks=MonoMathMath]

\definefont[MyMathFont]    [MonoMathBase]
\definefont[MyMathFontBold][MonoMathBaseBold]
\definefont[MyTextFont]    [MonoTextBase]

% Todo, be specific

\definetyping[mathtyping][style=MyMathFont]
\definetype  [mathtype]  [style=MyMathFont]

% Then these can go:

\setuptyping
  [style=MyMathFont]

\setuptype
  [style=MyMathFont]

\stopmodule