- 4 Simple Steps to read from Memory
- 1. Place address of value you want to read on bus
- 2. Assert the processor’s RD (read) pin
- 3. Wait one clock cycle for the memory chips to respond
- 4. Copy the data that has now appeared on the bus
- Caches on the CPU
- Used to store most recently used instructions
- This is done because often the CPU is the true bottle neck to most processes
- There are levels of cache the lower number=faster=closer to the actual CPU
- Level 1 is directly on the CPU
- Level 2 is connected to the CPU by a high speed memory bus
- These are static RAM (SRAM) which is more expensive and faster than traditional RAM (DRAM)
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