COMP 273 Lecture Notes - Lecture 3: Instruction Register, Program Counter, Nibble
25 Jan 2017
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Review it is 5 volts (1), 2 volts (0), or 0 volts (computer is off): we learned what a bit was. We will look inside the black box eventually. Inside of: we also learned about pathways . It is a wire or an analog of a wire. You can put 5v, 2v, or 0v in the wire. One way to transmit information is to send 5v, turn it off, send 5v again, turn it off again, send 2v, Information can pass in the wire, but it is crucial to note that the entire wire becomes that voltage. turn it off, and then send 5v. A bus is equivalent to n n-wires, which are equivalent to one unit" of data. There are n wires, and one wire is one unit. There are and: how a cpu runs. Didn"t finish though! goes in the wrong way, the computer will freeze. There is a slow bus and a fast bus.
