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All
and
more
about Sharp
PC-1500
at
http://www.PC-1500.info
(EX)
INC
XL
XL=
I
0 0
1
I
0
I
1
~
Ex.ecute
I
,
J
__
,
XL=
0
0
1
1
1
0
~
Z=
O
,
V=
O
C=
O
.
H
=
I)
•
@
DEC (DECrement)
The
\'alue
of
the
accumulator or
register
is
DECremented
by
one.
In
the
case of the
8-
bit register
(A.
RL.
RH).
it
makes
nag.
<
C.
V.
Hand
Z
changed.
I
n
the
case
of
the
1
6-bit
regi:;ler
Rrcg.
no
nag
change
lakt~S
place.
• Forn1at
•Operation
DF.C
A
(Operand
)
-
I
-
(opcrnnd
)
DEC
RI.
(C.
V.
H
.
and
Z
cha
nged.)
DEC
RH
DEC
R1
·eg
[Opern
nd)
-
I
-
·
(operand
)
{EX)
DEC
Xreg
XL
=
0
0
0
0
0 0
0
0
XL
=
I
t
I
I
I
t
I
t
1
I
Ex.ecute
' - - - - - - - - - - - ' ·
-
XH
=
0
0
0
0
0
0
1
XH=
I
0
0
0
o
o
o
o
I
2-4-3. Compare and bit test
@
CPA (ComPare Ace)
l'he
contents
of
the
accuntulator
arc
corn
parcd
\V
ith
rtgister
or
cx!crnal
n1en1ory. and
itl' >
result
is
represented
by
nags
c:.
V.
11. and
Z.
•
l.-orn1at
CPA RL
CPA
RH
C
PA
(Rrcg)
C
PA
ll(Rrt:g)
c
r
A (ah)
C
PA
11("1>)
(EX)
CPA XL
A-
lo
1
XL
Io
1
0
I
0
1
0
1
0
0
•Operation
0
0
A
-
(opcrnnd
]
-
cha
nge
in
C.
V. H.
;rnd
7.
or
A
+
(operand]
+
I
-
·
change
in
C.
V.
H.
and
7.
Comparison
I
c
z
v
H
- ·-
A>
[operand
)
0
*
*
A
=
I
operand)
1
1
*
*
A<
[operand)
0
0
*
*
*
:
Flags V and
H
rnay change
accord ing
to
lhe
cond
ition
mentioned
in ,;Status
flag", but
i
t
has
no
meaning
with the
CPA
instruction.
O
l
Execute
C-
1
•
Z=
O
ol
31
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not
sale
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