Installation and Configuration Section TwoGPIB-PC User Manual 2-14 ©National Instruments Corp.EOS ByteSome devices can be programmed to terminate a read operation when aselected character is detected. A linefeed character (hex 0A) is apopular one.NOTE: To send the EOS character to a device in a write operation, youmust explicitly include that byte in your data string.EOS Modes• Terminate a Read on EOS - Some devices send an EOS bytesignaling the last byte of a data message. A yes response willcause the GPIB-PC to terminate read operations when itreceives the EOS byte.• Set EOI with EOS on Write - A yes response will cause theGPIB-PC to assert the EOI (send END) line when the EOScharacter is sent.• 7- or 8-bit compare on EOS - Along with the designation of anEOS character, you may specify whether all eight bits arecompared to detect EOS, or just the seven least significant bits(ASCII or ISO format).Set EOI with last byte of WriteSome devices, as Listeners, require that the Talker terminate a datamessage by asserting the EOI signal line (sending END) with the lastbyte. A yes response will cause the GPIB-PC to assert EOI on the lastdata byte.GPIB-PC ModelThe GPIB-PC Model must be specified so that the handler will use theappropriate hardware addressing scheme.Board is System Controller (Boards Only)This field appears on the board characteristics screen only. Generally,the GPIB-PC will be the System Controller. In some situations, such asin a network of computers linked by the GPIB, another device may beSystem Controller and the GPIB-PC will NOT be designated SystemController. A yes response designates the GPIB-PC to be SystemController. A no response designates it not to be System Controller.
