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LCO-IV------------------------------------------------------------------
Group
Mnemonic code
Function
Status
M N E I
i
M
~
i
NZ
Y N E I
i
Y
~
i
NZ
ANEM
A:!tM
NZ
Compare
BNEM
B
~
M
NZ
ALE I
i
A ~ i
NB
AlEM
A~M
NB
BlEM
B~M
NB
SEM
n
1
-+
M (n)
RAM bit
REM
n
o
-+
M (n)
Manipulation
TM
n
Test M (n)
M (n)
BR
a
Branch on Status 1
1
CAL
a
Subroutine Jump on Status 1
1
ROM
lPU
u
load Program Counter Upper on
Address
Status 1
TBR
P
Table Branch
RTN
Return from Subroutine
S E I E
1
-+
I/E
S ElF 0
1
-+
IF 0
S ElF 1
1
-+
IF 1
SETF
1
-+
T F
SECF
1
-+
C F
REI E
0
-+
I/E
REI F 0
0
-+
IF 0
REI F 1
0
-+
I F 1
RETF
0
-+
T F
Interrupt
RECF
0
-+
C F
TIO
Test
INTo
INTo
TI1
Test
I NT.
INT.
TI FO
Test
IF 0
I Fo
TIF1
Test
I F 1
I F.
TTF
Test
TF
TF
l TI
i
i
-+
Timer/Counter
lTA
A
-+
Timer/Counter
lAT
Timer/Counter
-+
A
RTNI
Return Interrupt
SED
1
-+
0
(Y)
RED
o
-+
0
(Y)
TO
Test
D(Y)
D(Y)
SEDD
n
1
-+
0
(n)
Input/Output
REDO
n
o
-+
0
(n)
(Display Control)
lAR
p
R (p)
-+
A
lBR
P
R (p)
-+
B
lRA
p
A
-+
R (p)
lRB
p
B
-+
R (p)
Pp
Pattern Generation
NOP
No Operation
(NOTE)
1. (XY) after a mnemonic code has four meanings as follows.
Mnemonic only
Instruction execution only
Mnemonic with X
Instruction execution, X -
SPX
Mnemonic with Y
Instruction execution, Y -
SPY
Mnemonic with XY
Instruction execution, X - SPX, Y-SPY
[Example] LAM
M
-+
A
LAMX
M
-+
A, X -SPX
LAMY
M
-+
A, Y -SPY
LAMXY
M
-+
A. X -SPX. Y _Spy
216
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