RadiSys Endura GL815E Product Manual

RadiSys Endura GL815E Product Manual Manual pdf 41 page image

GL815E Endura Motherboard Product ManualPage 41 of 51A.5. ISA Interrupt AllocationThe ISA interrupts are allocated as described in the table below.Interrupt DescriptionIRQ0 System TimerIRQ1 Keyboard ControllerIRQ2 Cascade interruptIRQ3 COM2, COM1 or unassignedIRQ4 COM1, COM2 or unassignedIRQ5 Parallel port or unassignedIRQ6 FloppyIRQ7 Printer port or unassignedIRQ8 Real time clock/CMOS RAMIRQ9 UnassignedIRQ10 UnassignedIRQ11 UnassignedIRQ12 PS/2 mouse or unassignedIRQ13 Floating point unitIRQ14 Primary IDE or unassignedIRQ15 Secondary IDE or unassignedNMI PCI PERR and SERR signals and ISA IOCHCHKA.6. ISA DMA Channel AllocationWhilst the motherboard does not support an ISA bus, it includes an ISA-compatible DMA controllerin order to be compatible with AT standard architecture. The DMA channels are allocated asdescribed in the table below.DMA Channel DescriptionChannel 0 Unassigned 8-bit channelChannel 1 Unassigned 8-bit channelChannel 2 Floppy controller or unassigned 8-bit channelChannel 3 ECP parallel port or unassigned 8-bit channelChannel 4 Cascade channelChannel 5 Unassigned 16-bit channelChannel 6 Unassigned 16-bit channelChannel 7 Unassigned 16-bit channel