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5. The following program has a delay subroutine located at 2060H. Read the pro- gram and answer the questions following. Comments ;Main Program Memory Addresses
5. The following program has a delay subroutine located at 2060H. Read the pro- gram and answer the questions following. Comments ;Main Program Memory Addresses 2000 2003 2006 2009 200C Instructions LD SP, 2100H LD HL, 2050H LD BC, 000AH CALL 2060H OUT (PORTI), A Delay Subroutine 2060 2061 2062 PUSH HL PUSH BC LD HL, A2FFH 2072 2073 POP BC POP HL RET 2074 a. When the Call instruction located at 2009 is executed, specify the contents of the stack location 20FE, and the address in the stack pointer. b. List the stack locations and their contents after the execution of the instruc- tions PUSH HL and PUSH BC in the subroutine. c. List the address in the stack pointer and the contents of the BC registers after the execution of the instruction POP BC. d. Where does the program return after the execution of the instruction RET at the end of the subroutine? e. Specify the contents of the stack pointer after the execution of the RET in- struction. 5. The following program has a delay subroutine located at 2060H. Read the pro- gram and answer the questions following. Comments ;Main Program Memory Addresses 2000 2003 2006 2009 200C Instructions LD SP, 2100H LD HL, 2050H LD BC, 000AH CALL 2060H OUT (PORTI), A Delay Subroutine 2060 2061 2062 PUSH HL PUSH BC LD HL, A2FFH 2072 2073 POP BC POP HL RET 2074 a. When the Call instruction located at 2009 is executed, specify the contents of the stack location 20FE, and the address in the stack pointer. b. List the stack locations and their contents after the execution of the instruc- tions PUSH HL and PUSH BC in the subroutine. c. List the address in the stack pointer and the contents of the BC registers after the execution of the instruction POP BC. d. Where does the program return after the execution of the instruction RET at the end of the subroutine? e. Specify the contents of the stack pointer after the execution of the RET in- struction
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