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Contents Programming For ISA Hardware Overview Programmers Guide Scenario I/O Ports control Single read/write operations Data array read/write operations Accessing Physical Memory Addresses Memory Mapping Additional Functions Hardware interrupts handling at user level Common Functions OpenRapidIsa CloseRapidIsa IsRapidIsaOpened GetHardwareConfiguration Direct Port I/O GetPortByte GetPortWord GetPortLong SetPortByte SetPortWord SetPortLong ReadPortBuffer WritePortBuffer Memory Access MapPhysToLinear UnmapMemory GetMem GetMemW GetMemL SetMem SetMemW SetMemL Hardware Interrupts UnmaskIsaIrq MaskIsaIrq GetInterruptCounter		Scenario Go to RapidDriver Main Page Before using any of the functions of RapidIsa, the driver must be initialized with the help of the function OpenRapidIsa . It must be done once after starting the application. Also resources used by the driver should be cleaned up(driver closed) before the application is closed. Schematic session of using RapidIsa: // initialize(open) the driver   hIsa =  OpenRapidIsa( 0 );    // Check if the driver initialized successfully   if ( IsRapidIsaOpened(hIsa)) {         ...    //////////////////////////////////////   /////////  RapidIsa session //////////   /////////  ................ //////////   //////////////////////////////////////   // Free resources used by the driver (close the driver)            hIsa = CloseRapidIsa(hIsa);    }   else     {   // An error happened while opening the driver   MessageBox("Cannot open the driver","Attention!", MB_OK | MB_ICONWARNING);      }   Driver can be initialized by many applications simultaneously, once for each ISA board. The parameter of OpenRapidIsa() can be used to select a device supported by RapidIsa driver.