ii Table of Contents3.3 Digital Output Register (BASE + 14).................................. 263.4 DIO Status & Control Register (BASE + 18)...................... 263.5 Interrupt Status & Control Register (BASE + 1C) .............. 293.6 8254 Timer Registers (BASE + 0) ..................................... 324 Operation Theory .............................................................. 334.1 Direct Program Control ...................................................... 334.2 Timer Pacer Mode ............................................................. 344.3 External Clock Mode.......................................................... 354.4 Handshaking ...................................................................... 364.5 Timing Characteristic ......................................................... 385 C/C++ Libraries ................................................................. 415.1 Libraries Installation ........................................................... 425.2 Programming Guide........................................................... 43Naming Convention ...................................................... 43Data Types ................................................................... 435.3 _7200_Initial ...................................................................... 44@ Description ............................................................... 44@ Syntax ...................................................................... 44@ Argument .................................................................. 44@ Return Code ............................................................. 445.4 _7200_Switch_Card_No .................................................... 46@ Description ............................................................... 46@ Syntax ...................................................................... 46@ Argument .................................................................. 46@ Return Code ............................................................. 465.5 _7200_AUX_DI .................................................................. 47@ Description ............................................................... 47@ Syntax ...................................................................... 47@ Argument .................................................................. 47@ Return Code ............................................................. 475.6 _7200_AUX_DI_Channel................................................... 48@ Description ............................................................... 48@ Syntax ...................................................................... 48@ Argument .................................................................. 48@ Return Code ............................................................. 485.7 _7200_AUX_DO ................................................................ 49@ Description ............................................................... 49@ Syntax ...................................................................... 49