Table 6-4 Monitor System Calls Function Code (dec) System Function Call Description 3~ general I/O Performs the peripheral (including Floppy, Hard Disk, Network, tape, etc.) operation specified by the I/O parameter block defined in the following protocol. [ input: bl=3~; int 20; ds:ax=pointer to parameter block ] output: resultant status return in the pre- defined locations of the same parameter block] 6-15