End Of String Register (Eosr) - National Instruments Corporation GPIB-1014P User Manual

Section Four

End Of String Register (EOSR)

VMEbus Address:
Attributes:
7 6
EOS6
EOS7
The End of String Register (EOSR) holds the byte used by the TLC to detect the end of a GPIB
data block transfer. A 7- or 8-bit byte (ASCII or binary) can be placed in the EOSR to be used in
detecting the end of a block of data. The length of the EOS byte to be used in the comparison is
selected by the BIN bit in AUXRA (AUXRA[4]w).
If the TLC is a Listener and bit REOS of AUXRA is set, the END bit is set in ISR1 whenever the
byte in the DIR matches the EOSR. If the TLC is a Talker and the data is being transmitted, and
XEOS bit of AUXRA is set, the END message (GPIB EOI* line asserted low) is sent along with
the data byte whenever the contents of the CDOR matches the EOSR.
Bit Mnemonic
7-0w EOS7-
EOS0
© National Instruments Corporation
Base Address + F (hex)
Write Only
5 4
EOS5 EOS4
Description
End of String Bits 7 through 0
3 2
EOS3 EOS2
4-47
Register Descriptions
1 0
EOS1 EOS0
W
GPIB-1014P User Manual