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• "n" character display
CD
ENTRY PREPARATION
•
Di
splay st
art
pos
iti
on
is
s
tor
ed in
th
e cursor pointer (7875 H).
• Size
of
the character string is stored in the accumul
ator
(0 1 H
::o;
ACC
;;>
IAH).
•
Leading address
of
the character string is s
to
red rn the U reg
(OOOO
H
~
Ureg
~
FFFF
H
).
0 ENTRY
ADDRESS
EDOOH
@
EXIT
ST
A
TE
• Change wi
ll
be met in carry.
Carry
Cursor
position
0
N
ext
to t
he
ri
ghtm
ost
posit
ion
of
the
ch
aracter s
tr
in
g
on
d i
sp
l
ay
.
1 In
dicates
the last
cha
racter
on
t
he
display,
in
case
di
sp
lay
shou
ld end
at 26th di
git
or ex
ceed
26th
digit.
NOT
E:
When
disp
l
ay
e
xc
eeds 156
dots
. the
con
tents
alte
r t
his
dot
posi
tion will be ig
nore
d.
• Output of "n" characters from the top of
LCD
"n" characters
wi
ll
be displayed unconditionally fro m the le
fl
side
of
LCD.
Q) E
NTRY
PREPARATION
• The leading addre
ss
of
the character string
is
stored in the Ureg
(OOOOH
~
Ureg
~
FF
FFH).
• Si
ze
of
th
e charact
er
string
is
stored in
XL
(OJ
H
;;;;
Xrcg
;;>
I AH).
0
ENTRY
ADDRESS
ED3BH
CD
EXIT
ST
A
TE
• Change
will
be met in carry.
Carry
Contents
0
Chara
cter
sir
i
ng
with
in 25
ch
ara
cters
.
1 Character
str
i
ng
more
than
26
cha
ra
cte
rs.
• Hexadecimal (2 byte - 1 byte)
ASC
II
code of two byt
es
is assumed to be a hexidecimal f
ig
ur
e and
is
changed into
numeric
of
one byte.
CD
ENTRY PREPARATION
• Leading address of
th
e
ASCll
code
is
st
or
ed
in
the Xreg.
133
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not
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