Microprocessors And Microcontrollers - Study Mode
[#136] Which of the following instructions of an 8086 microprocessor uses the contents of a CX register as a counter? 1. LOCK 2. LOOP 3. ROTATE Select the correct answer using the options given below:
Correct Answer
(C) Only 2 and 3
[#137] What is the capacity of internal RAM in 8051 microcontroller?
Correct Answer
(A) 128 bytes
[#138] Which of the following is not a characteristic of transparent DMA mode of I/O operation?
Correct Answer
(B) The normal rate of execution is slowed down
[#139] Which of the following peripherals provide I/O facilities? 1. 8279 2. 8155 3. 8259 4. 8255
Correct Answer
(D) 2, 4
[#140] Determine the contents of register AL in 8086 after the following instructions have executed MOV BL, 8 CH MOV AL, 7 EH ADD AL, BL
Correct Answer
(B) OAH-carry flag set