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.
