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Write and assemble a program to: a)     Set SP = $9D, b)    Put a different value...

Write and assemble a program to:

a)     Set SP = $9D,

b)    Put a different value in each of RAM locations $9D, $9C, $9B, $9A, $99, and $98,

c)     POP each stack location into registers R20 – R24.

d)    Use the simulator to single-step and examine the registers, the stack, and the stack pointer.

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Answer #1

;[a]


.INCLUDE "M32DEF.INC"
  

LDI R20, HIGH($9D)
OUT SPH, R20
LDI R20, LOW($9D)
OUT SPL, R20

;[b]


LDI R16, 1
STS $98, R16
LDI R16, 2
STS $99, R16
LDI R16, 3
STS $9A, R16
LDI R16, 4
STS $9B, R16
LDI R16, 5
STS $9C, R16
LDI R16, 6
STS $9D, R16

;[c]

POP R20
POP R21
POP R22
POP R23
POP R24

;[d]

L1: RJMP L1

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