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[SOLVED] ALU with 4 functions- need tutorials and materials on ALU

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Pacman.

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functions of alu

Hi folks, I need to make an ALU next semester for school and because it seems a bit complicated at the moment, I thought to ask for some help. The program we will use is EdWinXp and I have to create a working ALU that can do 4 operations (addition, shift left, xor, nor).

Schematic should be made following this diagram:
**broken link removed**

A and B are 4 bit inputs, C is 2 bit main input and Y is 4 bit output.

Could somebody help me to understand it better or link some online tutorials and materials that talk about ALU designment?
 

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