183
Chapter 4, Status Reporting
GPIB Status Register Groups
Output Queue Group
The Output Queue Group is a specific implementation of the status queue model
described in
"Status Queue Model" on page 105
. When a command is sent to the
Test Set that causes the Test Set to generate data, this data is buffered in the
Output Queue until it is read by the controller or the Output Queue Group is
cleared. The Output Queue Group includes a FIFO queue and a Message
Available (MAV) Summary Message.
Figure 26
shows the structure of the Output Queue Group.
Figure 26
Output Queue Group
Last Data Byte Entered
Next Data Byte Entered
First Data Byte Entered
Last Data Byte
to be Read
First Data Byte
to be Read
Message Available ( MAV )
(to bit 4 of Status Byte Register)
Queue Empty = "0"
Queue Not - Empty = "1"
Output Queue
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