Int F1  - Common Isdn Api (capi) V2.0 - "capi_register" - Initialize Capi  [-]

   AL = 01h
   AH = CAPI version number * 10 (14h for v2.0)
   ES:BX -> buffer for CAPI's use (refer to note below)
   CX = number of bytes for message buffer
   DX = maximum simultaneous logical (Level 3) connections
   SI = maximum concurrent received B3 data blocks (min. 2)
   DI = maximum B3 data block size (up to 2048 bytes)

Return: AX = CAPI-assigned application ID
       0000h on error
       BX = error number
           1001h registration error
Range: INT 00 to INT FF, selectable by program parameter

Notes: the caller is required to provide at least 512 bytes of stack space
   the CAPI interrupt handler begins with a header (see #3708) which is
     nearly identical to the IBM Interrupt Sharing Protocol header
     (see #2256 at INT 2D"AMIS"), except that the short jump instruction
     to a hardware reset handler at offset 09h is zeroed out and the
     entire header is inexplicably shortened by one byte
   the standard document suggests using 1024 + (1024*DX) bytes for the
     message buffer for typical applications
   the total size of the application-provided buffer must be at least
     CX + DX*SI*DI bytes

See Also: AH=01h,INT F1/AL=02h
Index: installation check;Common ISDN API

Format of CAPI v2.0 interrupt handler entry point:
Offset Size    Description (Table 3708)
 00h  2 BYTEs  short jump to actual start of interrupt handler, immediately
         following this data block (EBh 0Fh)
 02h   DWORD   address of next handler in chain
 06h   WORD    signature 424Bh
 08h   BYTE    EOI flag (80h)
       80h primary hardware interrupt handler (will issue EOI)
 09h  2 BYTEs  reserved (0)
       (is short jump to hardware reset routine in ISP header)
 0Bh  4 BYTEs  signature "CAPI"
 0Fh  2 BYTEs  two-digit CAPI version number in ASCII ('20')

See Also: #2256 at INT 2D