Physics · Microprocessors
The contents of register B and accumulator A of an 8085 microprocessor are 3C H and 89 H respectively. The contents of A and the status of carry flag (CY) and sign flag (S) after executing the SUB B instruction are:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1A = 5C H, CY = 0, S = 1
- 2A = C5 H, CY = 0, S = 1
- 3A = 5C H, CY = 1, S = 1
- 4A = 4D H, CY = 0, S = 0✓
Correct answer
A = 4D H, CY = 0, S = 0
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