memory type range registers

1 definition found

memory type range registers - Free On-line Dictionary of Computing (26 May 2007) :

  Memory Type Range Registers
  
     <architecture, video> (MTRR) Registers in the Pentium Pro
     and Pentium II processors that can be used to specify a
     strategy for communication with the external memory and
     caches for a number of physical address ranges.
  
     Strategies include write-through, write-back, or
     uncached(?).  Such control is useful where the memory is
     located on a device and is accessed via some kind of device
     bus, e.g. a PCI or AGP graphics card, where caching
     would be of no benefit.
  
     (1999-07-02)