Int 0C  - IBM System 36/38 Workstation Emulation - API Pointer             [I]

Desc:  the IBM System 36/38 emulator may be invoked through a private API,
     whose entry point address is offset 100h in the segment pointed at
     by this vector

Call the API entry point with
   AH = function
       03h update screen
       05h select next session
       AL = session number (00h-03h)

       Return: AL = session type code
               00h not active
               01h display session
               02h printer session
               FEh invalid session number
           DS = requested session's data segment (0 if not active)

Return: ???

Format of emulator's data area (offset from interrupt handler's segment):
Offset Size    Description
13Eh   BYTE    bit flags for status line indicators turned on since this byte
       last zerod
13Fh   BYTE    bit flags for status line indicators turned off since this
       byte last set to FFh
140h   WORD    offset of EBCDIC to ASCII translation
146h   WORD    offset of EBCDIC screen buffer
148h   WORD    offset of EC (engineering change) level signature
150h   BYTE    "KEYI"
151h   BYTE    5250 key scan code to be sent to remote
15Bh   BYTE    "SYSAV"
15Dh   BYTE    5250 cursor column
15Eh   BYTE    5250 cursor row
167h   BYTE    "DVCTAD"
178h   BYTE    "FLAGS"
184h   BYTE    "SESSNOAD"
193h   BYTE    "STNAD"
198h   BYTE    "NSDS"