Int 2F Fn C00E  U - Printcache V3.1 PCache.exe - Install ???               [c]

   AX = C00Eh
   ES:DX -> ???

Return: BX destroyed

Note:  ES:DX is stored internally if the variable is currently 0000h:0000h,
     but ignored if already set; a counter is incremented

See Also: AX=C000h"PCACHE",AX=C00Fh"PCACHE"