HMCS45C,HMCS45CL-------------------------------------------------------
[NOTE] 1.
(XV)
after a mnemonic code
has
four meanings
as
follows.
Mnemonic only Instruction execution only
Mnemonic with X After instruction execution, X ...
SPX
Mnemonic with Y After instruction execution, Y ...
SPY
Mnemonic with
XY
After 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 brings the Status F/F
"1"
under judgement instruction
or
instruction accompanying the judgement.
NZ
...... ···ALU Not Zero
C·····
····ALU Overflow in Addition, that
is,
Carry
NB
..... ····ALU Overflow in Subtraction, that is, No Borrow
Except above
·········Contents
of
the status column affects the Status F/F directly.
3. The Carry F/F
(C(F/F))
is
not always affected by executing the instruction whicll affects the Status
F/F.
Instructions which affect the Carry F/F
are
eight
as
follows.
AMC
SEC
SMC
REC
DAA
ROTL
DAS
ROTR
4. All instructions except the pattern instruction
(P)
are
executed in 1 instruction cycle. The pattern instruction
(P)
is executed
in 2 instruction
cycles.
80
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