Loose Leaf For Introduction To Computing Systems: From Bits & Gates To C & Beyond
3rd Edition
ISBN: 9781260424744
Author: Yale N. Patt, Sanjay Patel
Publisher: McGraw-Hill Education
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Chapter 4, Problem 19E
Shown below is a byte-addressible memory consisting of eight locations, and its associated MAR and MDR. Both MAR and MDR consist of flip-flops that are latched at the start of each clock cycle based on the values on their corresponding input lines. A memory read is initiated every cycle, and the data is available by the end of that cycle.
Just before the start of cycle 1, MAR contains 000, MDR contains 00010101, and the contents of each memory location is as shown.
a. What do MAR and MDR contain just before the end of cycle 1?
MAR: 
MDR: 
b. What does MDR contain just before the end of cycle 4?
MDR: 
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Q2- Write a program in assembly language for the 8085 microprocessor to receive one byte of data via the SID and store it at the memory address (3000H to 3009H) using a baud rate of 1200.
Information: The 8085 processor operates at a frequency of 3.072 MHz . When receive the required bytes, you must adhere to the following: The bits of two high bits will be received at the beginning of the reception(start bits 1 1 ), after that the data bits will be received, after that the low bit of the stop bit will be received (stop bit 0 ).
The following flowchart will help you.
The solution must be integrated and include the calculation of the baudrate delay time
Chapter 4 Solutions
Loose Leaf For Introduction To Computing Systems: From Bits & Gates To C & Beyond
Ch. 4 - Prob. 1ECh. 4 - Prob. 2ECh. 4 - What is misleading about the name program counter?...Ch. 4 - Prob. 4ECh. 4 - Prob. 5ECh. 4 - What are the two components of an instruction?...Ch. 4 - Prob. 7ECh. 4 - The FETCH phase of the instruction cycle does two...Ch. 4 - Prob. 10ECh. 4 - State the phases of the instruction cycle, and...
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