Compal-LA-1012 Schematic Circuit Diagram
Compal-LA-1012 Schematic Circuit Diagram
How to work Motherboard Cache
When alternative processors, known as bus masters, manage the system, the cache controller embedded into the CPU is also responsible for watching the memory bus. Bus spying is the practice of keeping an eye on the bus. When a bus master device writes to a memory area that is also currently stored in the processor cache, the contents of the cache and the memory no longer match. The cache controller then flags this data as invalid and reloads the cache on the next memory access, maintaining the system's integrity.
To facilitate recovery from cache misses, all PC processor architectures that have cache memory include a feature known as a translation lookaside buffer (TLB). The TLB is a table inside the CPU that keeps track of where previously visited memory locations are located. The TLB reduces the time it takes for virtual addresses to be translated into physical memory addresses.
Cycle time reduces as clock speeds rise. Cache on the motherboard is no longer needed in newer systems since the faster system memory can keep up with the motherboard speed. Modern processors, like the L1 cache, embed the L2 cache onto the processor die, and most current versions feature on-die L3 as well. Because the L2/L3 is now part of the core, it can now run at full speed.
