| 摘要 |
A method of testing system memory in a computer using computer instructions stored in the system memory, which includes a cache memory. It is first determined whether the computer supports memory type range registers (MTRRs), 208, which associate memory types (cacheability) with physical address ranges - fixed or variable - of the system memory. The described method is employed for computers which do support MTRRs. Whereas MTRRs are conventionally used statically by BIOS to map the cacheability of physical memory devices, according to the invention they are used dynamically, to temporarily prohibit caching of the memory test area (to allow through testing), while allowing caching of the test program/data/stack (to avoid the delay caused by no caching), once the first megabyte of system memory, which includes the test program instructions, has been tested without caching, 218. |
