User manual

User Manual 14
2-2. Installing Memory
ENDAT-7100M system board offers one 240 pin DDRII SDRAM socket supports
up to 1GB memory and the speed can be 400 and 533 MHz.
Note: For DIMM compatibility, please refer to page 40.
2-3. Shared VGA Memory
ENDAT-7100M is using built-in AGP VGA controller with S3 Graphics
UniChrome Pro IGP graphics core up to 64MB of system memory. The amount
of video memory on motherboard determines the number of colors and the video
graphic resolution.
2-4. Assigning IRQs for Expansion Cards
Some expansion cards require an IRQ (Interrupt request vector) to operate.
Generally, each IRQ must be exclusively assigned to specific use. In a standard
design, there are 16 IRQ available with 11 of them already in used by other part
of the system.
Some PCI expansion cards need IRQ; any remaining IRQ could be assigned to
PCI Bus. Microsoft's Diagnostic (MSD.EXE) utility included in the Windows
directory can be used to see their map. Clients can not have more than one
device apply the same IRQ in the system or it will cause the system hang up,
crash, and unexpected results. To simplify the process, this motherboard
complies with the Plug and Play (PnP) specifications, which was developed to
allow automatic system configuration. Whenever a PnP-compliant card is added
to the system, PnP card and IRQs will automatically assigned if available. The
PCI and PnP configuration in the BIOS setup utility can indicate which IRQs
have being used by Legacy cards.
In the PCI Bus design, the BIOS is automatically assigned an IRQ to a PCI slot
that has a card in it which requires an IRQ. To install PCI cards via riser card, you
need to set the correct "ADSEL" and "INT" (interrupt) assignment on the jumper
of riser card.