Support for the SDM-SIO1 device has been implemented. This enables the following instructions to be used for serial communications while this device is connected to the CR5000:SerialClose, SerialFlush, SerialIn, SerialInBlock, SerialInChk, SerialInRecord, SerialOpen, SerialOut, SerialOutBlock. See details in the SerialOpen CRBasic Help topic for more information about how this is accomplished. The SerialBrk instruction is not applicable to the SDM-SIO1 and therefore not implemented. The SerialInput instruction has been removed. Serial communications via the RS-232 port or via Control ports (C1,C2, etc.) of the CR5000 are not supported. Communications with AVW200 series devices can be achieved when using the SDM-SIO1 device and the program instructions listed above.