Logical or – Quantum Data 802BT User Manual
Page 115
802BT/802R Video Test Generator User Guide
105
The following figure illustrates IEEE-488 status reporting.
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.
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1
0
Logical OR
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6
ESB MAV
2
1
0
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5
4
3
2
1
0
RQS
MSS
Service
Request
Generation
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0
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Logical OR
P
o
w
er On
User Request
Command Error
Ex
ecution Error
De
vice Dependent Error
Quer
y Error
Request Control
Oper
ation Complete
Queue
Not-Empty
Output Queue
Standard
Event Status Register
Standard
Event Status Enable
Register
Status Byte Register
Service Request
Enable Register
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