National Instruments GPIB-MAC User Manual page 51

November 1985
Methods R and B determine how GPIB read operations
performed by the GPIB-MAC terminate. If Method R
alone is chosen, reads terminate when the low 7 bits of
the byte that is read match the low 7 bits of the EOS
character. If Methods R and B are chosen, a full g-bit
comparison is used.
Methods X and B together determine when GPIB write
operations performed by the GPIB-MAC send the END
message. If Method X alone is chosen, the END
message is sent automatically with the EOS byte when
the low 7 bits of that byte match the low 7 bits of the
EOS character. If Methods X and B are chosen, a full
Note that defining an EOS byte for the GPIB-MAC does
not cause the GPIB-MAC to insert that byte into the data
string when performing GPIB writes. To send the EOS
byte, you must include it in the data string that you send
following the
By default, no eos modes are enabled.
If you call eos with B alone as an argument, the GPIB-
MAC records the EARG error.
If you call eos without an argument, the GPIB-MAC
returns to you the current eos settings.
The assignment made by this function remains in effect
until you call eos again, call
GPIB-MAC.
Refer to the GPIB Read and Write Termination
explanation in Section Three.
40
SECTION FOUR - FUNCTIONS
wrt
programming message.
or you turn off the