What are the contents of the program counter pc sp and tos, Computer Engineering

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What are the contents of the program counter pc sp and tos

Question: The contents of the top of a memory stack (TOS) contains the value 0x3C7A. The stack pointer (SP) contains 0x2000.

A two- word procedure CALL instruction is located in memory at address 0x1957, followed by the address field of 0x0500 at location 0x1958. If push uses pre-decrement of SP and pop uses post-increment of SP, what are the contents of the program counter (PC), SP and TOS

Part 1: before the CALL instruction is fetched from memory?

Part 2: after the CALL instruction is executed?

Part 3: after the return from the procedure is executed?

Solve these parts in details and provide examples to support your rationale.

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