Podcast
Questions and Answers
80386 features ______ and Virtual Memory
80386 features ______ and Virtual Memory
Multitasking
Virtual Memory helps enlarge the ______ space
Virtual Memory helps enlarge the ______ space
address
ADS stands for Address Data ______
ADS stands for Address Data ______
Strobe
NA causes the 80386 to output the address of the next instruction or data in the current bus ______
NA causes the 80386 to output the address of the next instruction or data in the current bus ______
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Memory is divided into 4 8bit ______ called memory banks
Memory is divided into 4 8bit ______ called memory banks
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Real mode allows to address only the first 1MB of ______
Real mode allows to address only the first 1MB of ______
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In protected mode, segment register contains a ______
In protected mode, segment register contains a ______
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Each table contains 8192 ______
Each table contains 8192 ______
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Protected mode allows access above the first 1MB of ______
Protected mode allows access above the first 1MB of ______
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Segment address is the beginning address of any 64KB memory ______
Segment address is the beginning address of any 64KB memory ______
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Study Notes
80386 Features
- Offers both segmentation and virtual memory capabilities, enhancing system architecture.
- Virtual memory expands the available address space for applications, enabling more efficient resource management.
- Address Data Space (ADS) facilitates the organization and movement of data within the system architecture.
Operation of 80386
- NA (Next Address) signal directs the 80386 to identify the next instruction or data in the current bus cycle, crucial for instruction fetching.
- Memory is structured into four memory banks, each consisting of 8-bit sections, allowing for organized data storage and retrieval.
Memory Modes
- Real mode restricts access to only the first 1MB of memory, limiting the program's operational scope.
- Protected mode utilizes segment registers to manage memory access, enhancing system security and application stability.
- Each segment features a base address, which is the starting point of any 64KB memory block.
Tables and Memory Access
- Each segment table is designed to hold 8192 entries, facilitating structured memory management within protected mode.
- Protected mode permits access to memory beyond the initial 1MB limit, allowing for more extensive applications and multitasking environments.
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Description
Test your knowledge on the features of the 80386 processor, including multitasking, memory management, and virtual memory with and without paging. Understand concepts like large memory systems, multitasking, and virtual memory addressing.
