Testing buffer memory of microprocessor system

摘要

The reference memory (REG), used in the first level/second level cache testing, is of a register type and the testing is carried out by waiting a test bit pattern (TBM) into an intermediate memory (IM), from which it is copied into the buffer memory (cache) (CM) to be tested. Then the test bit pattern is copied into the reference memory, and the microprocessor (CPU) checks, if the patterns in the buffer and reference memories are the same. Then the microprocessor initiates a fault repairing operation, if the check did not find a coincidence.