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June 2023 Notes

Saturday 17 June 2023

Videos #3 to #8

Topics covered
  • Boolean logic (AND, OR, NOT and XOR) and gates - used in the creation of circuits to determine input and output
  • Computation - running query through a model with predictable outcomes
  • 64 bit required to handle sums involving the US national debt
  • Long term memory enabled by creating configurations of inputs and gates that always yield the same result (0 or 1)
  • Logic abstracted at higher and higher levels
  • Clock speed: number of cycles (reads) measured in Hz
  • Code runs through series of instructions located in memory addresses
  • Address contain operations (operating codes) e.g. add, subtract, jump, halt …
  • Instructions and data both in memory and go via the Control Unit
  • Actions taken on values in registries
  • Arithmetic Logic Unit (ALU) is a combinational digital circuit that performs arithmetic and bitwise operations on integer binary numbers
  • State is a model in a certain configuration. It is essentially fixed (memory cannot grow)
  • 0s and 1s are fixed and represented by a set of boolean operations (gates)
  • State can be changed (from read only to writable) by changing the state of a latch which then allows gates to reopen (or close)
  • The brain is also a (relatively) fixed structure. A memory is similar to repeating a question to an LLM
  • The response may be more or less fixed (low temperature comparable to a calculator summing 2 and 2) depending on complexity, frequency, etc.
  • Brain physical and subject to change: deterioration (age or illness), damage, use (repeated recall, common tasks like simple maths, everyday language)

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