ii • Table of ContentsOperation Theory ................................................................. 204.1 PhotoMos Relay Output ................................................ 204.2 Isolated Digital Input ...................................................... 224.3 Interrupt Architecture..................................................... 22C/C++ DOS Libraries ........................................................... 235.1 Programming Guide ...................................................... 235.1.1 Naming Convention................................................................235.1.2 Data Types...............................................................................245.2 _7258 Initial .................................................................. 255.3 _7258_DO.................................................................... 265.4 _7258_DO_Read_Back................................................. 265.5 _7258_DI ..................................................................... 275.6 _7258_INT_Control ....................................................... 275.9 _7258_CLR_IRQ .......................................................... 285.10 _7258_GET_IRQ_Status ............................................... 28Warranty Policy .................................................................... 29