
GMS81508/16
9
The bellows shows data store and restore sequence to/from stack area.
Interrupt
RETI
Subroutine CALL
RET
PUSH A ( X, Y, PSW )
POP A ( X, Y, PSW )
M (sp)
( PCH )
sp
sp
1
M (sp)
( PCL )
sp
sp
1
M (sp)
A
M (sp)
( PCH )
sp
sp
1
M (sp)
( PCL )
sp
sp
1
M (sp)
( PSW )
sp
sp
1
sp
sp
1
sp
sp
1
( PCL )
M (sp)
sp
sp
1
( PCH)
M (sp)
sp
sp
1
A
M (sp)
( PSW )
M (sp)
sp
sp
1
( PCL )
M (sp)
sp
sp
1
( PCH)
M (sp)
sp
sp
1
15 8
Stack Address ( 0100
H
01FF
H
)
01
H
7 0
SP
Hardware fixed