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Method and system for configuring plug and play devices for a computer operating system
| Details |
Inventors: Dawson, III, Marshall Allen; Landry, John Matthew;
Assignee: International Business Machines Corporation (Armonk, NY)
Primary Examiner: Heckler; Thomas M.
Assistant Examiner:
Attorney, Agent or Firm: Magistrale; Anthony N. Felsman, Bradley, Vaden, Gunter & Dillon, LLP
A method and system are disclosed for configuring PnP devices for a computer operating system by initiating a power on self test (POST) within a computer system for configuring PnP and PCI devices. During the process of configuring PnP and PCI devices, a list is composed of devices that are not absolutely necessary for booting the system (e.g. modem or ethernet controller). While the PCI devices are configured, if the system has no usable IRQ's, POST takes one from a nonessential PnP ISA (Industry Standard Architecture) device in the list, and gives it to the PCI device. The POST operation searches for the presence of a PnP operating system option while progressing through the startup sequence (of bootable media), and activates or deactivates all devices, depending on the type of media being attempted. If the medium is the hard disk (where the PnP operating system option resides), all of the PnP devices in the list are deactivated. If the medium is any other type (where a PnP operating system option is not likely to reside) the devices are activated. |
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DETAILED DESCRIPTION It is an object of the present invention to provide an improved information processing system.
It is another object of the present invention to provide an improved method and system for a plug and play (PnP) operating system that dynamically configures, activates and deactivates PnP devices.
It is yet another object of the present invention to provide an improved method and system for a plug and play (PnP) operating system that may dynamically modify the configuration of PnP devices allocated in an efficient manner in order to enhance system performance.
It is still another object of the present invention to provide an improved method system for a plug and play (PnP) operating system that provides all peripheral component interconnect devices (PCI) within a computer system to have interrupts assigned.
The above and other objects are achieved as is now described.
A method and system are disclosed for configuring PnP devices for a computer operating system by initiating a power on self test (POST) within a computer system for configuring PnP and PCI devices.
During the process of configuring PnP and PCI devices, a list is composed of devices that are not absolutely necessary for booting the system (e.
g.
modem or ethernet controller).
While the PCI devices are configured, if the system has no usable IRQ's, POST takes one from a nonessential PnP ISA (Industry Standard Architecture) device in the list, and gives it to the PCI device.
The POST operation searches for the presence of a PnP operating system option while progressing through the startup sequence (of bootable media), and activates or deactivates all devices, depending on the type of media being attempted.
If the medium is the hard disk (where the PnP operating system option resides), all of the PnP devices in the list are deactivated.
If the medium is any other type (where a PnP operating system option is not likely to reside) the devices are activated.
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I/O Systems 
