CONCEPT PRACTICE

Instruction addressing modes

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2007 Spring · Morning · Q19

Original 2007 Spring · Morning, question 19. Accessible description follows. — Original exam question · Select the image to enlarge

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Q19. Which of the following is the correct combination of various addressing modes? Here, X₁ is an address which is stored in a program counter. X₂ is an address part of an instruction which is addressed by X₁. X₃ is an address in which an operand needed to execute an instruction is stored. X₄ is a value in an index register. (X₂) means the contents of location X₂. Addressing mode Direct Indirect PC (Program Counter)-relative Indexed The choice-table column order is Direct, Indirect, PC (Program Counter)-relative, Indexed.

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Source: Technology-01.pdf, PDF page 209. ID: HIST-TECH01-2007S-Q019. Explanation written for this textbook.