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System and method for controlling device which is present in media console and system unit of a split computer system
| Details |
Inventors: Crump, deceased, Dwayne T.; Dawson, III, Marshall A.; Landry, John M.; Mohre, II, Carl L.; Norris, Duane E.; Robinson, Eric F.;
Assignee: International Business Machines Corporation (Armonk, NY)
Primary Examiner: Ray; Gopal C.
Assistant Examiner:
Attorney, Agent or Firm: Magistrale; Anthony N.
Disclosed is a split computer system that includes a first housing coupled to a second housing with a multi-conductor cable. The first housing includes a first direct access storage device (DASD) having an opening for receiving a removable storage medium. The second housing is separate from the first housing and includes a central processing unit (CPU) coupled to a local bus and an expansion bus, a non-volatile storage device coupled to the local bus, a second DASD coupled to the local bus and a power supply. The system further includes first and second DASD controllers coupled to the first and second DASDs respectively. The cable has one end coupled to the first housing and another end coupled to the second housing for electrically connecting devices in the first housing to devices in the second housing. The second housing has a first interface coupled to the expansion bus and the cable. The first housing also includes a second interface coupled to the cable and the first DASD. The system is operative to detect an access to either the first or second DASD controller and disable a current DASD controller and enable the other DASD controller. |
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DETAILED DESCRIPTION One embodiment of the present invention is directed to a personal computer system that includes a first housing coupled to a second housing with an electrical connector.
The first housing includes a first direct access storage device (DASD) having an opening for receiving a removable storage medium.
The second housing is separate from the first housing and includes a processor coupled to a local bus and an expansion bus, a non-volatile storage device coupled to the local bus, and a second DASD device coupled to the local bus.
The system further includes first and second DASD controllers coupled to the first and second DASD devices respectively.
The electrical connector has one end coupled to the first housing and another end coupled to the second housing for electrically connecting devices in the first housing to devices in the second housing.
The second housing has a first interface coupled to the expansion bus and the electrical connector.
The first housing also includes a second interface coupled to the electrical connector and the first DASD device.
The system is operative to detect an access to either the first or second DASD controller and disable a current DASD controller and enable the other DASD controller.
The first interface can be further operative to detect the access to the first or second DASD device and generate a system management interrupt (SMI) to the processor.
The processor then transfers control to an SMI routine which disables the current DASD controller and enables the other DASD controller.
The first DASD controller can include a first control register settable in one of an enabled state and a disabled state for enabling and disabling the first DASD device.
In addition, the second DASD controller can include a second control register settable in one of an enabled state and a disabled state for enabling/disabling the second DASD device.
Another embodiment of the present invention is directed to a computer system which includes a first housing containing a first direct access storage device having an opening for receiving a removable storage medium, and a first keyboard controller
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