Int F1  - Common Isdn Api (capi) V2.0 - "capi_set_signal" - Signal Handli  [-]

   AL = 05h
   AH = CAPI version number * 10 (14h for v2.0)
   DX = application ID (see AH=01h)
   ES:BX -> signal handler or 0000h:0000h to disable
   SI:DI = parameter to pass to signal handler

Return: AX = status (0000h,11xxh) (see #3710)

Notes: the caller is required to provide at least 512 bytes of stack space
   the signal handler is called as though it were an interrupt, with
     interrupts disabled and DX,SI,DI set as they were when this function
     was called; the handler must preserve all registers and return with
     an IRET
   the signal handler may call CAPI_PUT_MESSAGE, CAPI_GET_MESSAGE, and
     CAPI_SET_SIGNAL

See Also: INT F1/AL=01h