The requirements in this section apply for graphics adapters that use the PCI bus.
47. PCI graphics device supports IRQ and correctly populates PCI BARs
Consumer PC 98
Office PC 98
Entertainment PC 98
Required
Recommended
Required
Proper IRQ support is necessary for optimal support of video playback. The display driver for Windows queries the actual device to find its register locations and so on. The PCI base address registers (BARs) must be populated correctly for this information to be correct in the registry.
On adapters that do not support IRQ, the Interrupt Pin Register (3Dh) should be zero (0).
48. PCI system-board graphics device is not hidden from Plug and Play enumeration
Required
Some current implementations cause problems for supporting multi-monitor capabilities with system-board graphics devices. Some system vendors hide the system-board graphics adapter from the PCI bus when another graphics adapter is detected in the system. The system-board device must disable the PCI device rather than hiding it.