Int 7A Fn 09  - Ibm 3270 Workstation Program Api - Keyboard Services       [I]

   AH = 09h
   BX = 8020h (synchronous request)
   CX = 0000h
   DX = ID of keyboard manager
   AL = service number (see #3506)
   ES:DI -> control block

Return: ???

(Table 3506)
Values for 3270 Workstation Program keyboard service:
 01h   connect to keyboard
 02h   disconnect from keyboard
 03h   read from keyboard
 04h   send keystroke to session
 05h   disable input
 06h   enable input
 07h   update status code