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Contents RapidDriver Explorer Introduction The User Interface (Overview) Device Description Test Devices Driver Description New RapidDriver Project Step 1: Select Device Step 2: Project Description Step 3: ISA Resources Step 4: Driver Installation Generic RapidDriver Project Port I/O Memory-mapped I/O PCI Devices Working With ISA/PC-104 Devices New ISA/PC-104 Project Hardware Resources for ISA/PC-104 Input/Output (I/O) Port Ranges Memory Address Ranges Interrupt Request (IRQ) Line Direct Memory Access (DMA) Channel Test ISA/PC-104 Device Working With PCI Devices New PCI Driver Project Test PCI Device PCI Header Configuration Space Base Address Registers (BARs) Interruptions Settings for bus-master DMA Working with Parallel Port Devices New Parallel Port Project Test Parallel Port Device Parallel Port Settings LPT Pins Ports And Bits Interrupts Working With USB Devices New USB Project Test USB Device Descriptors and Configuration Vendor/Class Requests Pipe Operations Feature Requests		Interrupts Go to RapidDriver Main Page First of all, you must enable the interruptions for the selected parallel port in BIOS and in Control Panel (Port Settings->Use any IRQ assigned to the port). Also you must enable this capability by setting to "1" of bit 4 in the parallel port Control Register. Then IRQ pass from ACK line (Pin10) to systems interrupt controller and you can listen for interruptions.