Abstract: A device configuration method and apparatus initializes a device such as at least one graphics processor, by detecting whether the at least one graphics processor requires a dedicated address space. If the device requires a dedicated address space, boot up code, such as the system bios, maps the dedicated address space to another address space prior to running of an operating system. This is done based on, for example, using at least one subclass code bit in a class code register in configuration space memory as both a device function identifier and as control data to control mapping of the dedicated address space to another address space. The method and apparatus provides a type of universal method and apparatus for relocating or disabling, for example, VGA resources, through PCI registers or other suitable registers while maintaining legacy processing for graphics and video applications.

Abstract: A method of linking peripheral devices to a single interrupt procedure in a computer is comprised of storing in an interrupt vector table of a BIOS ROM, a first pointer to an interrupt service routine related to one of a group of peripheral devices which use the same interrupt request (IRQ) on the same software interrupt vector, and storing further pointer in each one of the peripheral devices to another unique one of the peripheral devices in the group.