LCD-III---------------------------------
(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
2. Status column shows the factor which affects status
by
the instruction
of
status change.
NZ
•.........
ALU
Not
Zeto
C ..........
ALU
Overflow in Addition/Carry
NB
..........
ALU
Overflow in Subtraction/No Borrow
except
above
.... Content
of
status column affects status directly.
3. Carry
flip-flop
is
not
always affected
by
executing the instruction which affects the Status.
Instructions which affect Cerry
flip-flop
are
eight
as
follows.
AMC
SEC
SMC
REC
DAA
ROTL
DAS ROTR
4.
All
instructions except
for
P
are
executed in single cycle.
P
is
executed in 2-cycle.
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