Skip condition
Number of
cycles
Number of
words
Instruction
code
D9
D0
Flag CY
2
16
Skip condition
Number of
cycles
Number of
words
Instruction
code
D9
D0
Flag CY
2
16
Skip condition
Number of
cycles
Number of
words
Instruction
code
D9
D0
Flag CY
2
16
Skip condition
Number of
cycles
Number of
words
Instruction
code
D9
D0
Flag CY
2
16
Rev.3.01
2005.02.07
page 68 of 112
REJ03B0104-0301
4501 Group
INY (INcrement register Y)
0000010011
013
11
–
(Y) = 0
Grouping:
RAM addresses
Description: Adds 1 to the contents of register Y. As a re-
sult of addition, when the contents of register
Y is 0, the next instruction is skipped. When
the contents of register Y is not 0, the next
instruction is executed.
Operation:
(Y)
← (Y) + 1
LA n (Load n in Accumulator)
000111nnnn
07n
11
–
Continuous
description
Grouping:
Arithmetic operation
Description: Loads the value n in the immediate field to
register A.
When the LA instructions are continuously
coded and executed, only the first LA in-
struction is executed and other LA
instructions coded continuously are skipped.
Operation:
(A)
← n
n = 0 to 15
LXY x, y (Load register X and Y with x and y)
11x3
x2
x1
x0
y3
y2
y1
y0
3x
y
11
–
Continuous
description
Grouping:
RAM addresses
Description: Loads the value x in the immediate field to
register X, and the value y in the immediate
field to register Y. When the LXY instructions
are continuously coded and executed, only
the first LXY instruction is executed and
other LXY instructions coded continuously
are skipped.
Operation:
(X)
← x x = 0 to 15
(Y)
← y y = 0 to 15
MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)
LZ z (Load register Z with z)
00010010z1
z0
04
11
–
Grouping:
RAM addresses
Description: Loads the value z in the immediate field to
register Z.
Operation:
(Z)
← z z = 0 to 3
8
+z