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Computer and Сomputer System Architecture (UWE – E.Merchan)

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When adding two 16-bit values using two 8-bit additions, why is ADD used for the low byte and ADDC used for the high byte?

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What is the value of A after executing MOV A,#9AH followed by ANL A,#0FH?

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What is the 8-bit hexadecimal two's complement representation of -25?

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After executing MOV A,#0C5H followed by SWAP A, what is the final value in A?

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When a LCALL instruction is executed, what value is pushed onto the stack as the return address?
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In CISC architectures like the traditional x86, what is the purpose of microcode in instruction execution?
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After executing DIV AB, where are the quotient and remainder stored?
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SP is initialized to 2FH. An LCALL instruction at address 0120H is executed, and the next instruction after LCALL is at 0123H. Which statement is correct about what is pushed to the stack?
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The SP is initiated at 40H. The code executes: LCALL SUB ; (next instruction). No other pushes occur. Immediately after LCALL finishes, which internal RAM locations contain the return address bytes?
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Which statement correctly characterizes the distinction between master equipment and executive equipment in a computer system?

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