Int 7A Fn 81  - IBM 3270 Workstation Program API - Resolve A Gate Name     [I]

   AH = 81h
   ES:DI -> 8-char blank-padded gate name
       "SESSMGR ", "KEYBOARD", "WSCTRL  ", "MFIC    ", "PCPSM   ",
       "3270EML ", "COPY    ", "XLATE   ", "OIAM    ", "MEMORY  ",
       "INDJQRY ", or "INDJASY "

Return: DX = gate ID