G - Physics – 06 – F
Patent
G - Physics
06
F
354/232
G06F 13/16 (2006.01) G06F 13/28 (2006.01)
Patent
CA 1233261
ABSTRACT OF THE DISCLOSURE System for the detection of programmable stop codes in a data exchange performed between the local memory of a microprocessor and a peripheral unit in a processor assembly using a direct access circuit to the local memory, said circuit dividing the access to a common bus permitting data exchanges between peripheral equipments and the local memory, said direct access circuit having a plurality of data exchange channels with the peripheral equipments, wherein it comprises a random access memory receiving the data on the addressing inputs and receiving an address bit on a data input, a control circuit having outputs, which are respectively connected to validation and writing control inputs of the random access memory, whereby said control circui respectively receives on inputs, signals coming from the microprocessor or the arbitration circuit and which respectively relate to the writing or reading input - output operations, as well as to the address significance decoding, and a test circuit connected to a reading output of the random access memory for testing, during a data exchange, the binary value recorded at the current address of the random access memory, determined by data signals, said test being controlled by a control signal applied to the test circuit by the direct access circuit to the local memory of the microprocessor.
433147
Debesson Pierre
Goudreau Gage Dubuc
LandOfFree
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