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Chapter 7
Terminate Read on EOS
Some devices send an EOS byte signaling the last byte of a data message.
A yes response in this field causes the GPIB board to terminate a read operation
when it receives the EOS byte. The default option for this characteristic is no.
Set EOI with EOS on Writes
A yes response in this field causes the GPIB board to assert the EOI line when
the EOS byte is detected on a write operation. The default option for this
characteristic is no.
Type of Compare on EOS
This field specifies the type of comparison to be made with the EOS byte. You
may state whether all eight bits are to be compared or just the seven least
significant bits (ASCII or ISO [International Standards Organization] format).
The default option for this characteristic is 7-bit.
Note:
This field is valid only if a yes response was given for either the Set
EOI with EOS on Write field or the Terminate Read on EOS field.
EOS Byte
Some devices can be programmed to terminate a read operation when a selected
character is detected. A linefeed character (hex 0A) is a common EOS byte.
The default option for this characteristic is 00H.
Note:
The driver does not automatically append an EOS byte to the end of
data strings on write operations. You must explicitly include this byte
in your data string. The EOS byte designation informs the driver of
its value so that I/O can terminate correctly.
© National Instruments Corp.
ibconf—Interface Bus Configuration Utility
7-11
NI-488.2M SRM for OS/2
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