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COMPUTER ORGANIZATION & ARCHITECTUREExplain register reference and memory reference instructions in detail with suitable examples.20197mMICROPROCESSORSThe instruction to copy the content of a memory location using a register indirect addressing mode is? (i) STAX (ii) LDAX (iii) LDA (iv) None of the above20232mCOMPUTER ORGANIZATION & ARCHITECTURE(3). Consider a hypothetical 32-bit microprocessor having 32-bit instructions composed of two fields—the first byte contains the opcode and the remainder the immediate operand or an operand address. (a) What is the maximum directly addressable memory capacity (in bytes)? (b) Discuss the impact on the system speed if the microprocessor bus has— i) a 32-bit local address bus and a 16-bit local data bus, or ii) a 16-bit local address bus and a 16-bit local data bus. \(c\) How many bits are needed for the program counter and the instruction register?202214mOPERATING SYSTEMThe address loaded into the memory address register of the memory is referred to as (i) Physical address (ii) IP address (iii) Port address (iv) Logical address20242m