1. How do the data retention characteristics of RAM and ROM storage devices differ?
1. How do the data retention characteristics of RAM and ROM storage devices differ?
Chapter22: Sequence Control
Section: Chapter Questions
Problem 6SQ: Draw a symbol for a solid-state logic element AND.
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![1. How do the data retention characteristics of RAM and ROM storage devices differ?
2. What is the purpose and use of the Program Counter (PC), Stack Pointer (SP), and Memory
Address Register (MAR) registers?
3. Write an 8085 program to store 4EH in memory location 2840H and store 3EH in memory
location 2841H, exchange them and store the result in memory locations 2842H and 2843H
respectively. Solve this problem using three different methods.
4. Write a program to exchange the content of memory locations [2801] [2800] with [2803]
[2802].
5. The following program is supposed to add the contents of memory location 2050h to the
Accumulator. The program works correctly only part of the time. Show that it is wrong to
execute the program and how to correct it.
MOV
LDA
ADC
HLT
В.А
2050H
в
6. In a multibyte addition program, when you must use the ADD instruction? When you must
use the ADC instruction?
7- The 8085-instruction set does not include a clear accumulator instruction. Which single-byte
logical instruction can perform this task?
8- The 8085-instruction set does not include a clear carry instruction. Which single-byte logical
instruction can clear the carry without modifying the contents of the accumulator?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc771941b-bd3f-470c-b260-c6e70d8464ab%2Fd84bb1ba-30b4-4d54-975c-ccc45e65875e%2Flx0t43j_processed.jpeg&w=3840&q=75)
Transcribed Image Text:1. How do the data retention characteristics of RAM and ROM storage devices differ?
2. What is the purpose and use of the Program Counter (PC), Stack Pointer (SP), and Memory
Address Register (MAR) registers?
3. Write an 8085 program to store 4EH in memory location 2840H and store 3EH in memory
location 2841H, exchange them and store the result in memory locations 2842H and 2843H
respectively. Solve this problem using three different methods.
4. Write a program to exchange the content of memory locations [2801] [2800] with [2803]
[2802].
5. The following program is supposed to add the contents of memory location 2050h to the
Accumulator. The program works correctly only part of the time. Show that it is wrong to
execute the program and how to correct it.
MOV
LDA
ADC
HLT
В.А
2050H
в
6. In a multibyte addition program, when you must use the ADD instruction? When you must
use the ADC instruction?
7- The 8085-instruction set does not include a clear accumulator instruction. Which single-byte
logical instruction can perform this task?
8- The 8085-instruction set does not include a clear carry instruction. Which single-byte logical
instruction can clear the carry without modifying the contents of the accumulator?
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