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lSI Index Skip,
Incremental
23
18 17 16 15 14
10
10 1
b
y
b
=
index register designator
00
(Approximate execution time: 3.0 p,sec.)
Instruction Description:
If
(B b
)=
y,
clear
Bb
and skip to address
P
+
2;
if not, add one to
(B b )
and RNI from address P
+
1.
Comments:
The
10.0
instruction is a
SSH
(storage shift) instruction, described later in this
chapter.
Instruction in
F
,~
Increment
(Bb)
by 1
No
Yes
Clear
Bb
and
"""'-
(Bb)
=
y
?
and
RNI @ P + 1
RNI @ P + 2
.,"
...
~
1$'D'>lnd"t·$fd.p •.•... ,
Decrementa'-
23
18 17 16 15
14
00
10
11 1
b
y
(Approximate execution time: 3.0 p,sec.)
b
=
index register designator
Instruction Description:
If
(B
b
)
=
y,
clear
Bb
and skip to address
P
+
2;
if not, subtract one
from (B
b
)
and RNI from address P
+
1.
Comments:
When b=O, RNI from
P
+
1
if
y
~
0;
RNI from
P
+
2
if
y
= O.
Instruction in F
,II
Decrement (Bb)
by
1
No
Yes
Clear Bb
and
--
(Bb)
=
y ?
...
and
-
RNI @ P + 1
RNI@P+2
7-19
Rev. B
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