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It is effective only in steps where this pro-
LEFT
Divides the memory in two and specifies
grammed instruction is given.
the short word on the left.
FIX
L
nn
Instructs to round up.
Note:
A divided memory has only 6 digits as a
Input key operation:
mantissa. Therefore, when a value is
FIX
5/4
nn Instructs to round off.
stored in a divided memory, the lower
8
Input key operation:
digits of the full word value would be
FIX, nn
Instructs to round down.
left out. However, since the data are
Input key operation:
~
changed to the scientific floating point,
o
1-5 Instructions Related to the Memory
the order of the data will be retained.
It consists of a part that indicates the contents of
Indirect addressing liND)
a process (RM, SM, CM, LM).and a part that
Indirect addressing is one of the address
specifies memory address (nn). The instructions
modification, and useful in the case of
are entered in two steps.
storing (or recalling) the calculated data
The memory address is indicated with two-digit
sequentially to (or from) the designated
numerals from 00 to 99.
memories in the iterative routine.
It is possible to use it together with right-left
instructions that divide the memory in two and
Procedure: Put !ND instruction before
with ir.ldirect instruction for indirect addressing.
memory instruction such as,
()
IND
SM nn
Stores the contents of the buffer regis -
SM
ter to the specified memory. The con -
tents of the buffer register will not
XX
()
change.
and the data is stored in (or recall ed
RM nn
Recalls the contents of the specified
from) the memory of which address
memory to the buffer register. The
number is stored in the XX memory_ In
contents of the memory will not change
the iterative routine, the number stored
o
after recalling.
in that XX memory is increased (or
CM nn
Clears the specified memory.
decreased) one by one or two by two, at
o
LM nn
Accumulates the contents of the buffer
every excecution of the routine, so that
register into the specified memory. The
you can store (or recall) the data se-
contents of the buffer register will not
quen tially to
(or
from) the memory
change.
address
designated
by
indirect
ad-
o
CM all
CI ears the ent ire memory area_
dressing system. In case of escaping
Input key operation:
from this iteration, use one of the condi -
()
Splittil,g memory:
tional jumps of I F
~
0, '" 0,
<
0, or IF
Divides the memory in two and specifies
ENT. Contents
of
the indirect memory
the short word memory either on the
must take the full word format.
right or left side. This system is very
o
useful for mass data, as long as it is kept
in mind that the digit of data is limited
o
up to
6
digits.
RIGHT
Divides the memory in two and specifies
o
the short word memory on the right
()
side.
o
o
19
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