Microprocessor Architecture: Real Mode Memory Addressing

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In real mode memory addressing, how much memory space is available for addressing?

1K byte

1M byte (correct)

64K byte

4G byte

What is the term used to refer to the first 1M byte of memory in real mode?

Conventional memory (correct)

Virtual memory

Secondary memory

Cache memory

How are real mode memory addresses structured?

Only segment address

Only offset address

Segment address multiplied by offset address

Segment address plus an offset address (correct)

What does the segment address define in real mode memory addressing?

Beginning address of any 64K-byte memory segment Signup and view all the answers

How is the segment and offset address sometimes written?

1000-F000 Signup and view all the answers

What does the code segment register define?

Start of the code segment Signup and view all the answers

Which mode does the 80286 and above microprocessors operate in?

Both real and protected modes Signup and view all the answers

What is the purpose of segment and offset addressing in a memory system?

To allow DOS programs to be relocated in memory Signup and view all the answers

Why can a relocatable program be executed without change when placed in any area of memory?

Because the contents of the segment register don't need to be changed Signup and view all the answers

What is the significance of the offset value 000016 and FFFF16 in a segment?

They indicate the starting and ending addresses of the segment Signup and view all the answers

How does segment plus offset addressing allow DOS programs to be relocated in memory?

By changing the contents of the segment register only Signup and view all the answers

What does it mean for a program to be relocatable in the context of memory?

It can execute without change when placed in different areas of memory Signup and view all the answers

How does segment and offset addressing affect the relocation of data in memory?

It enables data to be placed in any area of memory without change to the program Signup and view all the answers

What is the purpose of the adder in generating a physical memory address?

To perform arithmetic operations on segment and offset values Signup and view all the answers

What is the significance of having an offset address within a segment?

It enables easy relocation of data within memory segments Signup and view all the answers

What is the significance of the segment and offset values in the physical address calculation?

They enable multiple combinations to yield the same physical address Signup and view all the answers

In the context of memory address space, where is the less significant byte stored?

In the lower address byte Signup and view all the answers

What type of boundary is an 'aligned word' stored at?

Even boundary Signup and view all the answers

What is the value of the data word stored at memory location 00724H?

5502H Signup and view all the answers

Which memory address contains the most significant byte in the given example?

0072B16 Signup and view all the answers

What hexadecimal value does the memory address 0072516 represent?

7D16 Signup and view all the answers

What does the combination 12B0:0025 illustrate?

Physical address calculation with segment and offset values Signup and view all the answers

Where is the least significant byte stored in a memory word according to the text?

Lower address byte Signup and view all the answers

What type of boundary does an aligned word have its less significant byte stored at?