Int 7A Fn 09  - Ibm 3270 Workstation Program Api - Translate Data          [I]

   AH = 09h
   BX = 8020h
   CX = 00FFh
   DX = ID of XLATE
   AL = service
       01h translate from host characters to ASCII and vice versa
       (determined by control block byte 11)
   ES:DI -> control block

Return: ???