IBM PPC-1510PT user manual Jumper, INT/AD Configurations, Assigning IRQs for Expansion Cards

There are two different riser cards that can be fitted to NASA-6109 CPU board. The first one is a 98pin ISA only Bus riser card (traditional ISA Bus riser card), the second one is a 188pins PCI/ISA riser card.

Please note: PCI/ISA riser cards jumper settings have to be matched with the motherboard INT/AD-select

jumper.

The default INT/AD-select for NASA-6109/3601MAll-In-One motherboard is listed in the above table. However, it could be revised by changing JP14 setting for different INT/AD-select. The following table shows the variable configurations:

INT/AD Configurations:

Expansion for PCI Slot	* Close 1-2	Close 2-3
Expansion PCI 1	INT =A,B,C,D	INT = B,C,D,A
Expansion PCI 2	INT = B,C,D,A	INT = C,D,A,B
Expansion PCI 3	INT = C,D,A,B	INT = D,A,B,C
Expansion PCI 4	INT = D,A,B,C	INT = A,B,C,D

Note: Even change the setting for different configuration theAD-select should be match to each INT. Please using the default setting as above if you are not familiar with the configuration of raiser card and add-on card.

Caution: Do not insert PCI BusAdd-On cards directly into the on-board expansion slot!

2-6. 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.

Both ISA and PCI expansion cards may need to use IRQ. Cards installed in the ISAExpansion Bus have the first priority to use the available system IRQs. Any remaining IRQ then, may be assigned to this PCI Bus. Microsoft's Diagnostic (MSD.EXE) utility included in the Windows directory can be used to see their map. Make sure that there are no two devices using the same IRQ in the system. Otherwise this will cause the system to hang up or give 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 cards and IRQs are automatically assigned if available. If the system has both Legacy and PnP ISA cards installed. IRQs are assigned to PnP cards from those not used by Legacy cards. The PCI and PnP configuration in the BIOS setup utility can be used to indicate

which IRQs have being used by Legacy cards. For older Legacy cards that do not work with the BIOS, you can contact your vendor for an ISA configuration utility.

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