Int F1 Fn 05  - Common Isdn Api (capi) V1.1 - "api-set-signal" - Signal H  [-]

   AH = 05h
   DX = application ID (see AH=01h)
   ES:BX -> signal handler or 0000h:0000h to disable

Return: AX = status (0000h,1002h) (see #3709)

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; the handler must preserve all registers and
     return with an IRET

See Also: AH=01h