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| '''Tags''' contain the address information required to identify if the information in a cache location coresponds to the data needed. These tags contain the upper bits of the memory address. Below we show the division for an 8 bit address with 8 memory locations in the cache. ||||||||||||||||||Upper bits||||||||||Lower bits|| ||7||||6||||5||||4||||3||||2||||1||||0|| The upper bits are contained in the tag. |
'''Tags''' contain the address information required to identify if the information in a cache location coresponds to the data needed. These tags contain the upper bits of the memory address. |
Cache
Direct Mapped Cache Cache's are directed mapped if each memory location is mapped to exactly one location in the cache. An example would be:
location = (Block Address) MOD (Number of cache blocks in the cache)
In this way we can map a memory location to a cache location.
Example: Suppose we have a cache with 8 slots 2^3. Then a word at 45 would be found at slot 5 in the cache.
https://www.scotnpatti.com/images/directmappedcache.jpg
Tags contain the address information required to identify if the information in a cache location coresponds to the data needed. These tags contain the upper bits of the memory address.
