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Programming Appendix A
Operand Description Notation Application examples
Specifying
an indirect
address
using a reg-
ister
Indirect
address
(No offset)
The bit or word with the memory
address contained in IR@ will be speci-
fied.
Specify ,IR@ to specify bits and words
for instruction operands.
,IR0
,IR1
LD ,IR0
Loads the bit with the memory address
in IR0.
MOV #0001 ,IR1
Stores #0001 in the word with the
memory address in IR1.
Constant
offset
The bit or word with the memory
address in IR@ + or – the constant is
specified.
Specify +/– constant ,IR@. Constant off-
sets range from –2048 to +2047 (deci-
mal). The offset is converted to binary
data when the instruction is executed.
+5,IR0
+31,IR1
LD +5 ,IR0
Loads the bit with the memory address
in IR0 + 5.
MOV #0001 +31 ,IR1
Stores #0001 in the word with the
memory address in IR1 + 31
Auto Incre-
ment
The contents of IR@ is incremented by
+1 or +2 after referencing the value as
an memory address.
+1: Specify ,IR@+
+2: Specify ,IR@ + +
,IR0 ++
,IR1 +
LD ,IR0 ++
Increments the contents of IR0 by 2
after the bit with the memory address
in IR0 is loaded.
MOV #0001 ,IR1 +
Increments the contents of IR1 by 1
after #0001 is stored in the word with
the memory address in IR1.
Auto Dec-
rement
The contents of IR@ is decremented by
–1 or –2 after referencing the value as
an memory address.
–1: Specify ,–IR@
–2: Specify ,– –IR@
,– –IR0
,–IR1
LD ,– –IR0
After decrementing the contents of IR0
by 2, the bit with the memory address
in IR0 is loaded.
MOV #0001 ,–IR1
After decrementing the contents of IR1
by 1, #0001 is stored in the word with
the memory address in IR1.
Data Operand Data form Symbol Range Application example
16-bit con-
stant
All binary data or
a limited range of
binary data
Unsigned binary # #0000 to #FFFF ---
Signed decimal ± –32768 to
+32767
---
Unsigned deci-
mal
& &0 to &65535 ---
All BCD data or a
limited range of
BCD data
BCD # #0000 to #9999 ---
32-bit con-
stant
All binary data or
a limited range of
binary data
Unsigned binary # #00000000 to
#FFFFFFFF
---
Signed decimal ± –2147483648 to
+2147483647
---
Unsigned deci-
mal
&&0 to
&4294967295
---
All BCD data or a
limited range of
BCD data
BCD # #00000000 to
#99999999
---