Which of the following operation performed by ADD M instruction? A) Add the contents of memory location (specified BC register pair) to the accumulator. B) Add the contents of memory location (specified HL register pair) to the accumulator. C) Add the contents of memory location (specified DE register pair) to the accumulator. D) Add the contents of B register to the accumulator.

Consider an instructionADD R1 , R2. ( Add the contents of Register R2 to the contents of Register R1)Give the steps (micro operations) involved in the execution of an above given instruction.

Which register is typically used to hold the memory address of the next instruction to be executed?a. Program Counter (PC)b. Accumulator (ACC)c. Data Register (DR)d. Stack Pointer (SP)

Consider an instructionADD R1 , R2. ( Add the contents of Register R2 to the contents of Register R1)Give the steps (micro operations) involved in the execution of an above given instruction.Answer:MAR ← PCMDR ← Mem[MAR]IR← MDRR1← R1+R2PC← PC+4

If the instruction involves reading from or writing to memory, the __________ register will be used to hold the address, and the __________ register will hold the data to be written or read.  PC and DRIMAR and IRMAR and MDRMAR and DATA BusALU and DR

When a subroutine is called, the address of the instruction following the CALL instruction is stored in/on the a)         stack pointerb)         accumulatorc)         program counterd)         stack