\starttypescript [math] [irianis] [name]
\definefontsynonym [MathRoman] [name:irianisadfmathregular] [features=math]
\stoptypescript
\starttypescript [serif] [irianis] [name]
\setups[font:fallback:serif]
\definefontsynonym [Serif] [name:irianisadfmathregular] [features=default]
\stoptypescript
\starttypescript [irianis]
\definetypeface [irianis] [rm] [serif] [irianis] [default]
\definetypeface [irianis] [ss] [modern] [modern] [default]
\definetypeface [irianis] [tt] [mono] [modern] [default]
\definetypeface [irianis] [mm] [math] [irianis] [default]
\stoptypescript
\usetypescript[irianis]
\setupbodyfont[irianis]
\starttext
some text and math
\startformula
c^2 = a^2 + b^2
\stopformula
\stoptext
Wolfgang