26
All and more about Sharp PC
-1
500 at http:/lwww.PC-1500.info
CD
AD
I (ADd I
mmediate)
To
either the accumulator
or
the
exte
rnal
memory
is added the
im
me
d
ia
te data.
In
the
case
of
ADI
to the accumulator.
carr
y
is
includ
ed
in
the operation.
C. H. Z. and V may change.
•F
o
rmal
ADI
A.i
ADI
(Rreg)J
AD
I
11(
R reg).i
AD
I (ab).i
AD
I
ll
(ab).i
(E
X) ADI
(Xreg).
20H
•Op
eration
A + i +
C-A
[operand] + i - [operan
d)
20H is added to the
memory
represented by X register.
Xreg
=4
FOOH
___
Exe
cute
Conte
11
1s = I 0 0 1 1 0 0 1 1 I- Contents= J 0 I 0 1 0 0 l
of 4
FO
OH
of
4
FOOH
.
C= O • H= O • Z= O • V= O
(i)
DCA
(DeC
im
al
Add)
Decimal addition is ca
rr
i
ed
out
be~wccn
the external memory and lhe accumul
ator
includi
ng
carry. and its
res
ult is stor
ed
in
the accumulato
r.
C.
H.
Z. and V
may
change.
•Fo
r
mat
DCA
(
Rr
eg)
DCA
ll(
Rr
eg)
(EX)
DCA
( Y reg)
• Operation
I) A + 66H - A
2) A + [opera
nd
] + C - A
(
C.
H. Z. a
nd
V
ma
y change.)
J)
A+
DA
-
/\
Wh
ere
.
DA
is u
sed
for
compensat
ion
or decimal
nu
mber w
hi
ch is dependent on the
va
lue
of
flags C
and
H
in
regard to Item 2).
c
0
0
H
0
1
0
DA
9AH
AOH
F
AH
OO
H
Decimal
additi
on
is carried
out
between the
memory
represented
by
the Y
register a
nd
the accumul
ato
r.
Y
reg
= 4700H
ts
A
Cont
en
of
47
0•
OH
35H
27H
35H 2
7H
35H
67H
35H
67H
After
e•e
culion of D
CA
c
Decimal
add
iti
on
c
H
A
0 0 1 6
2H
35
+ 27+0= 62
I 0 1
63
H
35
+ 27+1 -
63
0 l l
02
H
35
i
6710
= 1
02
1 I I
03
H
35
t
67
I 1= 1
03
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