Sharp PC-1500 Technical Reference Manual page 127

122
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5-4-1. Character functions
• Combination of character string
Con1bination of character string .. ) aind charac(cr string-2
(!)E NTRY PREPARATION
• Prepa racion of character strings
Character string inf<>rrnation of the character string-I is stored in the arithljnelic
register
(7AOOH - 7A07 H).
C haracter string inf(>r1na1ion
or
t he character string-2 is stored in the arithtllC tic
register
(7A IOH - 71 \1 7H).
• 1 0 11
is stored in the string buffer pointer
(iS94H).
(~
ENTRY ADDRESS
D925H
• Subroutine is called in the fol1o\ving
forn1a1:
SJ P (Address where PS H X reg is wri11rn)
D B DATA (Error return address}
PSH Xrcg
l
PSH
Yrcg Write in other addresses .
.IMP 0925
... .., ....... --
~
PSH Xr ec
::>JP - - - ·
P SH
Yreg
1
Data
~~:~:
.. I
::_--_~ -~
-
~ :~, · -
_
:~
--
-r .. , ,
l; t
C rrcr - - - - '--':...-.. HTN
Q)
EXIT STATE
• \Vhcn no error
Ret urns tO t ht.: ad d ress next to t he d ata.
l~ esulta nt
charac1er string
inforn1atio1l
' viii
then be stored in 1hc arithmetic register X
(7A0011 -7A07H)
and the combined
character
st
ring.~
\\
1
i1l
he
sto red
in
the
st ring buffer (7 ll I 0 I-{ ...... ).
• \ \' hen er ror
r\ ftt·r storing
t he error codi.: in t he lJ H rcgistcr. il returns to the data stored address
pl
us one.
NOTE: Fot details o f character string info,malion. 'efe, 10 lhe
parngn1ph
discussin g the
Stfut lure of
v~ riable
and
pfog ra n~ .
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