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TABLE
4.11
Standard Event
Status
and Enable
Registers
DIO
Line
Bit
Function
1
0
T
=
Operation Complete
2
1
Not
used
-
always
logic
0
3
2
'1'
=
Query
Error (see
NOTE
1)
4
3
Not
used
-
always
logic
0
5
4
T
=
Execution
Error
(see
NOTE
2)
6
5
'1
r
= Command
Error
(see
NOTE
3)
7
6
Not
used
-
always
logic
0
8
7
'V
=
Power
On
(after
power
interrupt)
NOTE
1:
Error generated
either
if
controller
tries to
read
the
Output
Queue
when
no output
is
available or
data
in
the
Output
Queue
is lost.
NOTE
2:
Error generated
either
if
data associated
with a
particular
command
header
is
out
of range,
of
the
wrong
type
for
a
particular
com
m
a
n
d,
or
if
a
valid
program message
could not
be
executed.
NOTE
3:
Command
Error can be
as
a result
of
one
of
the
following:
(1)
Syntax
error.
(2)
Device has
received
an
unrecognized
or
unimplemented
header.
(3)
'GET'
message
has occurred within a
program
message.
(4)
The
command
string will
be
correctly
executed up
to
the point the error
occurs.
The
remaining
string
up
to
the next
command
separator
(;),
or
a valid
program message
terminator,
will
be ignored.
Execution
will
continue as
normal
after
reception
of
either of these delimiters.
4-20
2151
OPS
A1571/DA
ALOl/Iss.01/03.94
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