Sharp PC-1500 - Page 42

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(EX)
! PSli A
A= 0 0
S=4 71JO H
? PSH Xrcg
Xreg= 2030H
S= 46Ffli
@> POP (POP)
1
_. Execute
- S 46FFH
Execute
-- S =- 46 FOH
46rDtl
46F£H
4 6FfH
4700 H
-
-
XH contents
XL con te nts
A contents
-
~
The content s of the stac k pointer tran sferred by the PSH in~tructitm an: returned to the
accumulator or th e R register.
In the case of the accumulator. the stack point er is added by one. In th e case of the R
register. the s ta ck pointer is added by two.
•F orm at
(i) POP A
® POP Rreg
(EX)
,,,.-
""'
• Op er atio n
S + I -· S
(S) - A
Flag Z
I: when (S) - OOH
0: \\h en (S) 'I OO H
S +
l-S
(S) - RH
S+ I - S
(S)- RI.
(No !lag change)
!
POP Xreg
Ex ecu te
P= 4 6FOH _,. P
46rrH
.....
Xreg- 2030 11
46FDH
2 POP A
I-
46FEH
2()i
Execute
f-
P= 46ffli
.
p
4700H
t6FFH
»i
0 0
A-
4700H 3rH
---i
..... -
- _,,
@ ATT (A ce To T)
The contents of the accumulator arc transferred 10 the T register.
• For m at
ATT
• Opera tio n
A-T
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