Data Saved To Stack Memory (Mkii Mode); Data Restored From Stack Memory (Mkii Mode) - NEC PD754144 User Manual

Figure 4-11. Data Saved to Stack Memory (MkII Mode)
PUSH instruction
Stack
SP – 2 Register pair, low
SP – 1 Register pair, high
SP
Figure 4-12. Data Restored from Stack Memory (MkII Mode)
POP instruction
Stack
SP Register pair, low
SP + 1 Register pair, high
SP + 2
Note The contents of PSW other than MBE and RBE are not saved or restored.
Remark *: Undefined
CHAPTER 4 INTERNAL CPU FUNCTION
CALL, CALLA, CALLF instruction
Stack
SP – 6 PC11-PC8
SP – 5 0 0 0
SP – 4 PC3-PC0
SP – 3 PC7-PC4
SP – 2 * * MBE RBE
SP – 1 * * *
SP
RET, RETS instruction
Stack
SP PC11-PC8
SP + 1 0 0 0
SP + 2 PC3-PC0
SP + 3 PC7-PC4
SP + 4
* * MBE RBE
SP + 5 * * *
SP + 6
User's Manual U10676EJ3V0UM
Interrupt
SP – 6 PC11-PC8
0 SP – 5 0
SP – 4 PC3-PC0
SP – 3 PC7-PC4
SP – 2 IST1 IST0
Note
* SP – 1 CY SK2
SP
RETI instruction
SP PC11-PC8
0 SP + 1 0
SP + 2 PC3-PC0
SP + 3 PC7-PC4
SP + 4
IST1 IST0
Note
* SP + 5 CY SK2
SP + 6
Stack
0 0 0
MBE RBE
PSW
SK1 SK0
Stack
0 0 0
MBE RBE
PSW
SK1 SK0
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