Microprocessors 8086/8088

Question 1) (28p) Fill in the blanks and True/False Questions a) (2p) Which prefix is used for the inequality case for CMPS and SCAS instructions? ANS: b) (2p) What directive is used in Assembly Language to inform the assembler that the program is using 32-bit instructions? ANS: c) (p) To use a math coprocessor with the 8088, one must connect the 8088 in (minimum/maximum) mode. d) (1) RESET is an I (input/output) signal for the 8088. e) (1p) To access the buses for interfacing with the CPU, AEN must be (low/high). f) (1) A (latch /tri-state buffer) is used in the design of input ports. g) (3p) How are ports (of 8255) configured after the control register is loaded with 89H? ANS: h) (1) Which is more economical? (i) Linear Address Select or (ii) Absolute Address Decoding i) (2p) Find the control word if PA = input, PB = input, and PCO-PC7 = output. Ans: j) (1p) The instruction MOV DX,[AX] is illegal in the 8086 but MOV DX,[EAX] is legal in the 32-bit x86. (True/False) k) (3p) Indicate whether each of the following pins of 8088 are input pins, output pins, or both. (1) ADO-AD7: (1) ALE: (ii) A8-A15: 1) (ip) It is possible for both the Sign and Zero flags to be set at the same time. (True/False) m) (p) PTR operator returns the 32-bit address of a variable. (True/False) n) (2p) DAA and DAS instructions are used after and operations. .) (2p) The CMP instruction works by performing an) operation on the operands and setting the flags accordingly. p) (ip) The following code jumps to the label named Target? (True/False) mov ax, 8109 I cmp ax, 26h jg Target ed with q) (2p) To toggle all bits of an 16-bit operand, it could be r) (1) SAL and SHL instructions are equivalent. (True/False)