Acer AcerPower Sx Acer Power SX/SXb/SC Service Guide - Page 53

PnP/PCI Options The PnP/PCI Options menu allows you to specify the settings for your PCI devices. Selecting this option displays the following screen: PnP/PCI Options PCI IRQ Setting Auto] INTA INTB INTC INTD PCI Slot 1 PCI Slot 2 PCI Slot 3 PCI IRQ Sharing Yes] VGA Palette Snoop Disabled] Graphics Aperture Size 64 ] MB Plug and Play OS Yes] Reset Resource Assignments No ] The following table describes the parameters found in this sub-menu. Settings in boldface are the default and suggested settings. Parameter PCI IRQ Setting PCI Slot 1 / 2 / 3 PCI IRQ Sharing VGA Palette Snoop Graphics Aperture Size Description Allows you to automatically or manually configure the Plug-and-Play (PnP) devices installed in your system. Refer to your device manual for technical information about the PCI card. Allows you to manually assign an interrupt for each PCI device installed in your system. When the PCI IRQ Settings is set to Auto, BIOS automatically assigns the available IRQs to the PCI devices. Allows you to assign the same IRQ to two different devices. Enables the palette snooping feature (if you installed more than one VGA card in the system) allowing the control palette register (CPR) to manage and update the VGA RAM DAC (Digital Analog Converter, a color data storage) of each VGA card installed in the system. The snooping process lets the CPR send a signal to all the VGA cards so that they can update their individual RAM DACs. The signal goes through the cards continuously until all RAM DACs data has been updated. This allows the display of multiple images on the screen. Some VGA cards have required settings for this feature. Check your VGA card manual before setting this parameter. This parameter determines the effective size of the graphics aperture. Graphics aperture is the address range that the AGP video and the CPU use to manage graphical objects. Options Auto or Manual Yes or No Enabled or Disabled The lowest setting is 8 MB and the highest is 256 MB. Chapter 2 45