\definefontfeature [medievalkorean]
  [mode=node,script=hang,lang=kor,ccmp=yes,ljmo=yes,vjmo=yes,tjmo=yes] 
\definefont [testfont] [UnBatang*medievalkorean at 20pt]
\starttext
\testfont

% 1112 119E 11AB 1100 1173 11AF
ᄒᆞᆫ글

\stoptext
