Method for recovering from error in a microprogram-controlled unit
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United States of America Patent
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-
Jan 21, 1986
Grant Date -
N/A
app pub date -
Sep 20, 1983
filing date -
Sep 28, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An erroneous microinstruction and related preceding microinstructions are subjected to a so-called retry operation so as to restore the microprogram-controlled unit and correct the error. The retry operation is carried out under an interlock mode, in which both detection and correction occur prior to processing for each microinstruction. At the same time, an address specifying a thus detected erroneous microinstruction is recorded. When the recorded address is next generated, the interlock mode is automatically entered for the erroneous microstruction only.
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