Suppose that an 8-bit microcontroller has a 16-bit stack pointer and uses a 16-bit register to...
Suppose that an 8-bit microcontroller has a 16-bit stack pointer and uses a 16-bit register to access the stack from the top. Assume that initially the stack pointer and the 16-bit register contain 20C016 and 020516 respectively. After the PUSH operation
1. What are the contents of the stack pointer?
2. What are the contents of memory locations 20BE16 and 20BF16?
Homework Answers
since a push operation is being performed which means the value is being put on the stack
hence the first stack pointer then stack pointer will be incremented and then the value will be put to the memory represented by the current stack pointer.
hence answer 1:
stack pinter = SP+1=20C016+1=20C017
answer 2:
since no changes have been made to the memories 20BE16 and 20BF16 hence both values will remain the same as before.
the contents cannot be determined with the question that has no details about the memory values currently on the stack.
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