Quantum Data 802BT User Manual page 115

802BT/802R Video Test Generator User Guide
The following figure illustrates IEEE-488 status reporting.
7 6 5 4
&
&
&
&
7 6 5 4
Service
Request
Generation
Status byte bit Definition
MAV Message available. Indicates that at least one complete response is present in
the output buffer.
ESB Event status bit. Indicates that one of the enabled conditions in the Standard
Event Status register is set.
MSS Master summary status. Indicates that the 802 has a reason for requesting ser-
vice.
RQS Request service. This bit is read only by executing a serial poll of the 802.
Standard
3 2 1 0
Event Status Register
&
&
&
&
3 2 1 0
Standard
Event Status Enable
Register
RQS
6 ESB MAV Status Byte Register
7 3 2 1 0
MSS
&
&
&
&
&
&
&
Service Request
7 6 5 4 3 2 1 0
Enable Register
Queue
Not-Empty
Output Queue
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