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1 definition found
 for direct mapped cache
From The Free On-line Dictionary of Computing (30 December 2018) :

  direct mapped cache
      A cache where the cache location for a given
     address is determined from the middle address bits.  If the
     cache line size is 2^n then the bottom n address bits
     correspond to an offset within a cache entry.  If the cache
     can hold 2^m entries then the next m address bits give the
     cache location.  The remaining top address bits are stored as
     a "tag" along with the entry.
     In this scheme, there is no choice of which block to flush on
     a cache miss since there is only one place for any block to
     go.  This simple scheme has the disadvantage that if the
     program alternately accesses different addresses which map to
     the same cache location then it will suffer a cache miss on
     every access to these locations.  This kind of cache
     conflict is quite likely on a multi-processor.  See also
     fully associative cache, set associative cache.

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