17 Lecture - Motorolla 68K Processors

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17 Lecture

CS401

Midterm & Final Term Short Notes

Motorolla 68K Processors

Motorola 68K processors are a family of 16/32-bit microprocessors that were widely used in personal computers, workstations, and embedded systems in the 1980s and 1990s. They were known for their powerful instruction set, high-speed operation, a


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  1. What is the data bus width of the Motorola 68K processor? A) 8 bits B) 16 bits C) 32 bits D) 64 bits Answer: C) 32 bits What was the maximum clock speed of the Motorola 68000 processor? A) 2 MHz B) 8 MHz C) 16 MHz D) 33 MHz Answer: C) 16 MHz Which addressing mode of the 68K processor allows for the addressing of data using a displacement relative to the program counter? A) Register addressing B) Immediate addressing C) Relative addressing D) Absolute addressing Answer: C) Relative addressing Which version of the 68K processor introduced support for virtual memory? A) 68000 B) 68010 C) 68020 D) 68030 Answer: C) 68020 Which of the following is not a register in the 68K processor? A) A0 B) D7 C) PC D) SP Answer: B) D7 What is the maximum amount of memory that can be addressed by the 68K processor? A) 1 MB B) 4 GB C) 16 MB D) 4 TB Answer: B) 4 GB Which instruction set architecture is used by the 68K processor? A) CISC B) RISC C) VLIW D) EPIC Answer: A) CISC Which of the following is not a member of the 68K processor family? A) 68000 B) 68010 C) 68030 D) 68060 Answer: D) 68060 Which interrupt handling method is used by the 68K processor? A) Polling B) Daisy chaining C) Vectored interrupt D) Direct memory access Answer: C) Vectored interrupt Which operating system was not supported by the Motorola 68K processor? A) Mac OS B) Windows C) AmigaOS D) Unix Answer: B) Windows



Subjective Short Notes
Midterm & Finalterm Prepration
Past papers included

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  1. What was the primary use of the Motorola 68K processors? Answer: The Motorola 68K processors were widely used in personal computers, workstations, and embedded systems in the 1980s and 1990s. What was the clock speed of the original Motorola 68000 processor? Answer: The original Motorola 68000 processor had a clock speed of 8 MHz. What were some of the unique features of the 68K instruction set? Answer: The 68K instruction set included flexible addressing modes, support for bit manipulation and logical operations, and powerful conditional branching instructions. What was the significance of the Motorola 68020 processor? Answer: The Motorola 68020 processor introduced support for virtual memory and was a significant improvement over its predecessor, the 68000. How many registers does the Motorola 68K processor have? Answer: The Motorola 68K processor has a total of 16 registers, including 8 data registers and 8 address registers. What is the maximum amount of memory that can be addressed by the 68K processor? Answer: The 68K processor can address up to 4 gigabytes of memory. What are some of the different addressing modes supported by the 68K processor? Answer: The 68K processor supports a variety of addressing modes, including register, immediate, direct, indirect, and indexed addressing. What was the role of the Motorola 68K processor in the development of the Amiga computer? Answer: The Motorola 68K processor was used as the primary CPU in the Amiga computer, and was a key factor in the system's success. What was the main advantage of the CISC architecture used by the 68K processor? Answer: The CISC architecture used by the 68K processor allowed for complex instructions to be executed in a single clock cycle, which resulted in faster overall performance. What eventually led to the decline of the Motorola 68K processor? Answer: The decline of the Motorola 68K processor was due to the rise of newer processors, such as the Intel x86 and the PowerPC, which offered better performance and compatibility with newer software.

The Motorola 68K processors were a series of CISC (Complex Instruction Set Computing) processors developed by Motorola in the 1980s and 1990s. These processors were widely used in personal computers, workstations, and embedded systems during this time period. One of the key features of the 68K instruction set was its support for flexible addressing modes. This allowed programmers to write code that could access memory in a variety of ways, including indexed, indirect, and immediate addressing modes. In addition, the 68K instruction set included powerful conditional branching instructions that made it possible to write complex control structures. The original Motorola 68000 processor had a clock speed of 8 MHz and was used in the first generation of personal computers and workstations. The 68010 and 68020 processors followed, offering increased clock speeds and support for virtual memory. One of the most notable uses of the Motorola 68K processor was in the development of the Amiga computer, which used the 68000 as its primary CPU. The Amiga was known for its advanced graphics and multimedia capabilities, and the 68K processor played a key role in making these features possible. The 68K processor has a total of 16 registers, including 8 data registers and 8 address registers. It can address up to 4 gigabytes of memory, and supports a variety of addressing modes including register, immediate, direct, indirect, and indexed addressing. While the 68K processor was known for its powerful instruction set and efficient design, it eventually fell out of favor due to the rise of newer processors such as the Intel x86 and the PowerPC. These processors offered better performance and compatibility with newer software, which made them more attractive to developers and end-users alike. Despite its eventual decline, the Motorola 68K processor remains an important part of computing history, and its impact can still be seen in many modern processors and instruction sets.

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