HP HP-67 - Page 247

Using the I-Register for Indirect Control 243
B
018
32
54]
Squares
nn.nn.
EEX
019
43
2
020
02|
Truncates
two
final
digits
2
021
71]
of
square.
@
)
022
31
83
D
023
43
4
024
04|
Truncates
two
leading
8
025
81|
digits
of
square.
a
026
32
83
@
027
22
24|
Transfers
execution
to
appropriate
operational
routine.
]
1
028
31
25
01
D
029
43
4
030
04
Result
appears
as
nnnn
a
031
71
PP
'
G530
032
23
00
033
35
22
B
&2
CE3
4
035
23
04]
}
Result
appears
as
.nnnn.
@
rTN
036
35
22
o
3
037
31
25
03
038
43
2
039
02
Result
appears
as
nn.nn.
040
71
PP
=3
2
041
23
02
Q
042
35
22
We could also have used a subroutine for the digits for 100 (that is,
2) in steps 002-003, 008-009, 019-020, and 038-039, but we
have used this more straightforward program to illustrate the use of
the [@ instruction.
When you key in a four-digit seed number in one of the three formats
§hown, an address (1, 2, or 3) is placed in the I-register. This address
18 used by the ([} instruction in step 027 to transfer program
execution to the proper routine so that the new random number is
seen
in
the
same
form
as
the
original
seed.