30 Questions
What is the primary function of the CPU?
To execute instructions and perform actions
What is the purpose of the address bus?
To provide the address of the memory location to be accessed
What determines the number of memory locations that the CPU can address?
The number of address bus lines
What is the function of the ALU in the CPU?
To perform arithmetic and logical operations
What is the purpose of the data bus?
To transfer data between the CPU and memory
Why are the outputs of many devices connected to the data bus, but only one device at a time is enabled?
To prevent bus contention and ensure data integrity
What is the range of the multiplexed address and data bus in the 8086 microprocessor?
AD0-AD15 & A16-A19
What is the duty cycle of the single phase clock required by the 8086 microprocessor?
33% duty cycle
How many instruction bytes can the 8086 microprocessor prefetch from memory?
6 instruction bytes
What is the function of the decoder in the Execution Unit (EU) of the 8086 microprocessor?
Translates instructions into a series of actions
What is the bit width of the Arithmetic Logic Unit (ALU) in the Execution Unit (EU) of the 8086 microprocessor?
16-bit
What is the purpose of dividing the 8086 CPU into two independent functional parts?
To speed up processing by dividing the work
What is the size of each segment in the 8086 architecture?
64 kbytes
What is the primary function of the BX register?
As an offset storage for forming physical address
What is the purpose of the Data Segment Register (DS)?
To point to the data segment of the memory
What is the total memory capacity that the 8086 architecture can address?
1 megabyte
What is the use of the CX register?
As a default counter
How many segment registers are there in the 8086 architecture?
4
What is the range of physical addresses in the 8086 microprocessor?
00000H to FFFFFH
How is the physical address calculated in the 8086 microprocessor?
Physical address = Segment address * 10H + Offset address
What is the main advantage of the segmented memory scheme in the 8086 microprocessor?
It allows the memory capacity to be 1MB
What is the purpose of relocation in the 8086 microprocessor?
To allow the program to be executed in different areas of memory
What is the condition for overlapping memory segments in the 8086 microprocessor?
CS1+IP1 = CS2+IP2
What is the benefit of allowing code, data, and stack portions of a program to be placed in different parts of memory?
Data and code protection
In the instruction MOV AX, [5000H], what is the segment address of the data?
DS
Which register cannot be used in register addressing mode?
IP
In register indirect addressing mode, which registers can be used as the offset register?
BX, SI, DI
In the instruction MOV AX, [BX], what is the effective address of the data?
10H * DS + [BX]
What is the default segment for the index register SI in indexed addressing mode?
DS
In which addressing mode is the offset of the operand stored in one of the index registers?
Indexed
Explore the inner workings of the Central Processing Unit (CPU), including instruction decoding, arithmetic logic operations, and memory management. Test your understanding of the CPU's components and their functions.
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