Review Assembly 80x86 two\'s complement help 28. If register AL contains the val

Question

Review Assembly 80x86 two's complement help

28. If register AL contains the value 11111100, what is the signed number in decimal format? (Hint: Use two?s complement) a) -3 b)-4 c)252 d)253 For the answer you select, please show your work here 29. If register AL holds the value 11111100, what is the unsigned number in decimal format? a)-3 b)-4 c)252 d)253 For the answer you select, please show your work here 30. Which instruction can be used for loading a floating point value into a register? a) MOV b) FL]) c) PUSH d) FMUL 31. if AX contains hex information 2111 and BX contains hex information 4333, what is the content in BX in hex format after performing asm instruction ADD BX, AX? a) BX will hold 2111 in hex format b) BX will hold 6444 in hex format c) BX will hold 4333 in hex format d) BX will hold 2222 in hex format 32. If AX contains hex information 2111 and BX contains hex information 4333, what is the content in BX in hex format after performing asm instruction SUB BX, AX? a) BX will hold 2111 in hex format b) BX will hold 6444 in hex format c) BX will hold 4333 in hex format d) BX will hold 2222 in hex format 33. What is the result after the following two statements are executed: MO VAL , OxFE; ADD AL, 5; a) The sign flag S is clear b) The zero flag z is set c) The carry flag C is set d) The overflow flag O is cleared

Explanation / Answer

28)

1111 1100

2s complement 0000 0011

+ 1

0000 0100===== -4

b is the answer

29) same b is the answer

30) b

31)b

32)d

33)c

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