Sharp PC-1500 - Page 54

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2-4-9. Subroutine jump instructions
@ SJP {Subroutine JumP)
The contems of the prog ram co unt er, w hi ch sh ow the next program executing address.
are stored in the stack
po i nte r, then the contro l j umps to th e subroutine addr es$
re pr ese nt ed by i and j of th e 16- bit i mmedia te data.
No change tak es pla ce in t1ags .
• Format
SJ P i,j
( EX ) $J P E OH , OO H
•Op eration
PL - (S)
S - 1
PH - (S)
S - 1
i- PH
i - Pl.
40 0 3H is stor ed in the stack poin te r by
the execution of STP instruc ti on and
jumps to t he su broutine of EOOOH .
Wi th the RTN in st ruction ot the
subroutine. t
he con tr ol re turns to 4003H
to resume prev ious program executi on .
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.t OOOU SJP
4001
H1- -,0tt- -I l SJP in$1rVC ll ~
1----1
="1--""'--1
4003H 1
lnsl r UC t :;()n ,
l
(OC()H Sv o ro1.thne
Qf' O<:~S.S-0"9
RIN
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