અન્ય તમામ ઉપયોગો કરતાં સર્વોચ્ચ પ્રાથમિકતાવાળો ઉપયોગ છે
જવાબ અને પગલાવાર ઉકેલ
A — LOCK̅ સિગ્નલ સાથે સ્થાનાંતરણ. LOCK̅થી સુરક્ષિત બસ સ્થાનાંતરણની પ્રાથમિકતા સૌથી વધુ છે, કારણ કે પ્રોસેસર અવિભાજ્ય/મહત્વની બસ ક્રિયા દરમિયાન અન્ય બસ માસ્ટરને નિયંત્રણ લેતા અટકાવે છે.
વિગતવાર ઉકેલ (મૂળ ભાષામાં)
Concept & Reasoning
LOCK̅ is used around atomic sequences so shared data cannot be interrupted by another bus master. HOLD requests and coprocessor/data-transfer needs must wait until the locked bus operation completes. This preserves consistency for critical read-modify-write sequences.
How to Solve It in the Exam
LOCK means atomic bus ownership.
Important Exam Point
Priority here is about bus usage/arbitration, not interrupt priority.
Quick Trick
LOCK means atomic bus ownership.
Common Mistake
Choosing HOLD as highest priority even while a locked transfer is active.
The highest priority usage than any other usage is
Answer & step-by-step solution
A bus transfer protected by the active-low LOCK̅ signal has highest priority because the processor is explicitly preventing other bus masters from taking control during an indivisible/critical bus operation.
Concept & Reasoning
LOCK̅ is used around atomic sequences so shared data cannot be interrupted by another bus master. HOLD requests and coprocessor/data-transfer needs must wait until the locked bus operation completes. This preserves consistency for critical read-modify-write sequences.
How to Solve It in the Exam
LOCK means atomic bus ownership.
Important Exam Point
Priority here is about bus usage/arbitration, not interrupt priority.
Quick Trick
LOCK means atomic bus ownership.
Common Mistake
Choosing HOLD as highest priority even while a locked transfer is active.
अन्य सभी उपयोगों से उच्चतम प्राथमिकता वाला उपयोग है
उत्तर और चरणबद्ध हल
A — LOCK̅ सिग्नल के साथ स्थानांतरण। LOCK̅ से सुरक्षित बस स्थानांतरण की प्राथमिकता सबसे अधिक है, क्योंकि प्रोसेसर अविभाज्य/महत्वपूर्ण बस संक्रिया के दौरान अन्य बस मास्टर को नियंत्रण लेने से रोकता है।
विस्तृत हल (मूल भाषा में)
Concept & Reasoning
LOCK̅ is used around atomic sequences so shared data cannot be interrupted by another bus master. HOLD requests and coprocessor/data-transfer needs must wait until the locked bus operation completes. This preserves consistency for critical read-modify-write sequences.
How to Solve It in the Exam
LOCK means atomic bus ownership.
Important Exam Point
Priority here is about bus usage/arbitration, not interrupt priority.
Quick Trick
LOCK means atomic bus ownership.
Common Mistake
Choosing HOLD as highest priority even while a locked transfer is active.
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