Dell PowerEdge 4100 Service Manual - Page 25

Table 1-3. Interrupt Assignments (continued) IRQ Line Used/Available IRQ10 Available for use by expansion card IRQ11 Available for use by expansion card IRQ12 Generated by keyboard controller to indicate that mouse's output buffer is full IRQ13 Generated by math coprocessor to indicate coprocessor error IRQ14 Available for use by expansion card IRQ15 Available for use by expansion card DMA Channel Assignments Table 1-4. DREQ Line Assignments DREQ Line Used/Available DREQ0 Available DREQ1 Available DREQ2 Generated by super I/O controller to initiate DMA cycle for attached diskette drive DREQ3 Available DREQ4 Generated by bus controller chip to activate second DMA controller DREQ5 Available DREQ6 Available DREQ7 Available System Overview 1-23