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Register Bit Descriptions Chapter 4
GPIB-1014 User Manual 4-8 © National Instruments Corporation
Command/Data Out Register (CDOR)
VMEbus Address: Base Address + 111 (hex)
Attributes: Write Only, Internal to TLC
7 654 3210
CDO7 CDO6 CDO5 CDO4 CDO3 CDO2 CDO1 CDO0
The Command/Data Out Register (CDOR) is used to move data from the VMEbus to the GPIB
when the interface (TLC) is the GPIB Talker or the Active Controller. Outgoing data is
separately latched by this register and is not destroyed by a read from the DIR. When a byte is
written to the CDOR, the TLC GPIB Source Handshake (SH) function is initiated and the byte is
transferred to the GPIB.
Bit Mnemonic Description
7-0w CDO[7-0] Command/Data Out Bits 7 through 0