Table
24.
Bit Assignments, Address Compare Register Q31
(X11
FI)
Bit
Position
Status
Significance
0
1
Selects
mapped address comparison.
0
Selects
unmapped address comparison.
1
1
Selects
address comparison during instruction access only.
0
Selects
address comparison for all memory
cycles.
2 1
Selects
comparisons only during memory write
cycle.
0
Selects
all
memory
cycle
comparisons.
3
1
Selects
page
comparisons.
0
Selects
word comparisons.
4
1
System turns on
audible
alarm for 220 microseconds
each
time
an
Address Compare occurs
{maximum frequency 1KHz}.
0 Address match alarm is disabled.
5
1
The processor is forced
into
the
HALT
state
when
an
Address Compare occurs.
0
Address
Halt
disabled.
6-7
-
Reserved.
8-31
-
Comparison address field.
166 Control Commands