Int 15 Fn 44C0  - Olivetti Quaderno - Initialize Digital Signal Processin  [b]

   AX = 44C0h
   ES:DI -> new DSP procedure (exchanged with CMOS[28h])
   ES:SI -> ??? buffer

Return: ES:DI -> old DSP procedure
   ES:SI buffer filled with ten bytes from CMOS (addresses 14h-1Ch)
     followed by 00h (addresses 15h-1Ch copied only if less than 21h)

Note:  this function is also supported by XBIOS.COM

See Also: AX=44C9h