JPS55142479A - Failure processing system for magnetic bubble memory - Google Patents

Abstract

PURPOSE: To increase the possibility of magnetic bubble memory, by providing the failed loop memory so that the defective loop is replaced into normal loop at write- in operation failure of the magnetic bubble memory.

CONSTITUTION: When the address A is delivered from the processor, it is converted into the minor loop number at the address conversion circuit 30, it is delivered to the ROM address register 31, ROM20 is accessed by setting the code, and it is stored in the ROM data register 32. Simultaneously, the readout of the register 33 is made. At normal, the output of the coincidence circuit 34 is 0 and the output of the selection circuit 34 is also 0. If a failure is produced for write-in operation, the content is stored in the buffer register 41, the failure detection circuit 42 detects the error, the analysis circuit 52 takes the output 54 as 1, and the bit location information 55 is delivered to the conversion circuit 53 at the same time. The circuit 53 delivers the failure report signal E to the processor. The processor judges the failure conditions from the signal E and retrial is made to the control unit with interruption. The operation like this is made by software.

COPYRIGHT: (C)1980,JPO&Japio