pahc 4

For the control block (in the CPU), which of the following functions is correct:

• [<$>] Increments the contents of the PC to point to the next command

• [<$>] Perform sign inversion

• [<$>] Contains temporary information for current CPU operations

• [<$>] Perform arithmetic and logic operations

What components are included in the EU block in the microprocessor?

• [<$>] Arithmetic and Logic Unit (ALU) and Control Unit (CU)

• [<$>] Arithmetic and logic unit (ALU), Control unit (CU) and command line

• [<$>] Arithmetic and logic unit (ALU) and command line

• [<$>] Arithmetic and Logic Unit (ALU), Control Unit (CU) and Registers (RF)

Considering the control signals from the system bus to the CPU, which of the following statements is correct:

• Interrupt accept signal

• Interrupt signal

• Memory compartment write control signal

• Memory compartment read control signal

The processor receives instructions at:

• [<$>] Memory or peripheral device

• [<$>] Peripheral devices

• [<$>] Central processing unit (CPU)

• [<$>] Memory

For the empty flag Zero - ZF in the status register (in the CPU), its meaning is:

• [<$>] Set to 1 when the result of the operation is 0

• [<$>] Set to 1 when the result of the operation is greater than 0

• [<$>] Set to 1 when the result of the operation is less than 0

• [<$>] Set to 1 when the result of the operation is remembered

Considering the control signals inside the CPU, which of the following statements is correct:

• [<$>] Controls data transfer from memory to peripheral devices

• [<$>] Controls data transfer from ALU to memory

• [<$>] Controls data transfer from register to ALU

• [<$>] Controls data transfer from CPU to ALU

Regarding the Carry – CF flag in the status register (in the CPU), which of the following statements is correct:

• [<$>] Set to 1 if the operation has no carry beyond the highest bit

• [<$>] Set to 1 if the operation carries beyond the highest bit

• [<$>] This is the overflow flag for signed numbers

• [<$>] Do not set to 1 when the operation carries beyond the highest bit

For machine code instructions, the operands can be:

• [<$>] At least two operands (source operand and destination operand)

• [<$>] Source operand or destination operand or both source and destination operands or no operand

• [<$>] Source operand only

• [<$>] Indicates the destination operand

Regarding the stack, which of the following statements is false:

• [<$>] Is a memory area with FIFO structure (First In - First Out)

• [<$>] When adding data to the stack, the stack pointer will decrease

• [<$>] The stack pointer always points to the top of the stack

• [<$>] Is a memory area with LIFO structure (Last In - First Out)

Regarding machine code instructions, which of the following statements is false:

• [<$>] The operand indicates the operation to perform

• [<$>] Machine instructions include two components: operation code and operands

• [<$>] The opcode indicates the operation that the processor needs to perform

• [<$>] The operand indicates where the data to be affected is located