INT 21 - European MSDOS 4.0 - "PIPE" - CREATE A NEW PIPE
        AH = 93h
        CX = size in bytes
Return: CF clear if successful
            AX = read handle
            BX = write handle
        CF set on error
            AX = error code (08h) (see AH=59h)
Desc:   create a communications channel which may be used for interprocess
          data and command exchanges
SeeAlso: AH=3Fh,AH=40h,AH=84h