SCSI controller and method for use on an information processing system

A peripheral device for executing commands provided by a central processing unit, comprising:

• command storing means for storing at least two commands provided by said central processing unit;
• command processing means for executing said commands in the order in which said commands were stored in said command storing means;
• execution result reporting means for reporting externally execution end status of a command at the end of execution of said command by said command processing means;
• determining means for determining if a command executed by said command processing means is the last command stored in said command storing means;
• and
• reporting inhibiting means for inhibiting the execution end status of the command executed by said command processing means from being reported externally if said determining means has determined that the command executed by said command processing means is not the command last stored in said command storing means and if said execution end status of said command executed by said command processing means is normal.

An information processing system for transmitting data using a small computer system interface bus, said system comprising:

• a central processing unit for issuing a plurality of commands for controlling said small computer system interface bus;
• command storing means for storing at least two commands provided by said central processing unit;
• command processing means for executing said commands in the order in which said commands were stored in said command storing means;
• execution result reporting means for reporting to said central processing unit execution end status of a command at the end of execution of said command by said command processing means;
• determining means for determining if a command executed by said command processing means is the last command stored in said command storing means;
• and
• report inhibiting means for inhibiting the execution end status of the command executed by said command processing means from being reported to said central processing unit if said determining means has determined that the command executed by said command processing means is not the command last stored in said command storing means an if said execution end status of said command executed by said command processing means is normal.

A small computer system interface controller controlling method for executing a plurality of externally provided commands for control of a small computer system interface bus, said method comprising the steps of:

• storing at least two commands that are externally provided;
• executing said commands in the order in which said commands were stored;
• determining if an executed command is the command last stored;
• and
• reporting execution end status of said executed command externally unless said executed command is not the command last stored and unless said execution end status of said executed command is normal.