G - Physics – 06 – F
Patent
G - Physics
06
F
354/224
G06F 11/00 (2006.01) G06F 9/22 (2006.01) G06F 11/10 (2006.01) G06F 11/28 (2006.01) H03M 13/51 (2006.01) G06F 11/16 (2006.01)
Patent
CA 1249372
ABSTRACT A self checking microprogram control unit detects errors concurrently with normal micro-instruction execution through internal checking circuits and a particular micro- instruction configuration in memory. Micro-instructions comprise additional fields carrying the encoding, in modified Berger code, of the address of the micro- instruction itself and of the following micro-instruction; micro-instructions which are the destination of condition- al jumps are located so that their codes are related to each other by simple logic relationships which are repro- duced by an internal circuit; the two fields from this and the following micro-instructions which relate to the same micro-instruction are then compared, and possible differences detect unidirectional and incorrect sequenc- ing errors. Other errors are detected by particular imp- lementations of certain internal circuits, and duplica- tion of others.
504935
Melgara Marcello
Paolini Maurizio
Turolla Maura
Ridout & Maybee Llp
Telecom Italia Lab Spa
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