Dma Channel Assignments - Dell 4100 Service Manual

Table 1-3. Interrupt Assignments
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
(continued)
System Overview 1-23