We studied an important lecture of Module 1 about how an ALU of CPU is built up and functioning.
The key components such as half-adder and full-adder are introduced. An example of 4-bit Ripple-Carry Binary Adder (RCBA) is illustrated to show how a computer can do Addition in general.
Complement concept is refreshed to remind about how to do subtraction, then a RCBA-based circuit for both Addition and Subtraction is introduced. Based on the circuit, other functional circuit such as incrementer/decrementer, multiplier/dividers are discussed.
The key components such as half-adder and full-adder are introduced. An example of 4-bit Ripple-Carry Binary Adder (RCBA) is illustrated to show how a computer can do Addition in general.
Complement concept is refreshed to remind about how to do subtraction, then a RCBA-based circuit for both Addition and Subtraction is introduced. Based on the circuit, other functional circuit such as incrementer/decrementer, multiplier/dividers are discussed.
To wrap up Module 1, we summarized knowledge learnt from lecture 1 to 5 in order to understand how a CPU works. After that, we studied how ISA are used by CU to control all operations of the CPU, e.g load data from registers, then select the bus to transfer it to ALU or Shifter for computational operations, and then transfer back to another register.
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