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Design and build a simple CPU on Logisim and write programs that can run on it. you can download Logisim by following this link: http://www.cburch.com/logisim/download.html
Your design will go through four phases:
Start by building an 8-bit ALU using Logisim. This ALU can implement 16 instructions on 8-bit operands. We would suggest the following minimum list of instructions:
In addition to these nine instructions, please suggest five more instructions that the ALU can implement for a total of 14 instructions (we are reserving 2 instructions for branching). Justify the importance of the five instructions you added in a Word doc to submitted as part of this assignment. Label these instructions as 'Phase One.'
After you've suggested and justified your five suggested instructions, please build at least the nine above-mentioned operations as blocks in Logisim.
In phase two of the project, you are required to design the instruction set of the ALU/CPU as follows:
In phase three, you are required to use Logisim to implement the control unit for at least the following three operations:
In order to finish this phase, you need to add operand registers according to the decision you took for the number of operands in phase two and, if needed, a flag register.
Please record your answer to phase three in the same Word doc and label it 'Phase Three.'
In order to be able to write assembly language for the CPU we need to add to instructions (without implementation):
Now, write the following programs using the assembly language you designed in the previous phases of the project as well as these two branching additional instructions:
Please record your programs in the same Word doc and label them under the section 'Phase Four.'
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