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GMS81C5108
20
JUNE 2001 Ver 1.0
Figure 8-4 Stack Operation
At execution of a
CALL/TCALL/PCALL
PCL
PCH
00BF
SP after
execution
SP before
execution
00BD
00BE
00BD
00BC
00BF
Push
down
At acceptance
of interrupt
PCL
PCH
00BF
00BC
00BE
00BD
00BC
00BF
Push
down
PSW
At execution
of RET instruction
PCL
PCH
00BF
00BF
00BE
00BD
00BC
00BD
Pop
up
At execution
of RETI instruction
PCL
PCH
00BF
00BF
00BE
00BD
00BC
00BC
Pop
up
PSW
0000
H
00BF
H
Stack
depth
At execution
of PUSH instruction
A
00BF
00BE
00BE
00BD
00BC
00BF
Push
down
SP after
execution
SP before
execution
PUSH A (X,Y,PSW)
At execution
of POP instruction
A
00BF
00BF
00BE
00BD
00BC
00BE
Pop
up
POP A (X,Y,PSW)
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