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ADDRESS SPACES S3C84E5/C84E9/P84E9
2-20
F PROGRAMMING TIP — Standard Stack Operations Using PUSH and POP
The following example shows you how to perform stack operations in the internal register file using PUSH and POP
instructions:
LD SPL,#0FFH ; SPL ← FFH
; (Normally, the SPL is set to 0FFH by the initialization
; routine)
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PUSH PP ; Stack address 0FEH ← PP
PUSH RP0 ; Stack address 0FDH ← RP0
PUSH RP1 ; Stack address 0FCH ← RP1
PUSH R3 ; Stack address 0FBH ← R3
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POP R3 ; R3 ← Stack address 0FBH
POP RP1 ; RP1 ← Stack address 0FCH
POP RP0 ; RP0 ← Stack address 0FDH
POP PP ; PP ← Stack address 0FEH