Let (BX)=100H, DI=200H, DS=1200H, SI= FO02H, AX= 0105H, and the following memory content. what is the content of SI after executing the MOV SI, [DI+BX+7H] instructions? * Memory Memory address content 11 AA 12300 12301 12302 EF 80 | 47 12303 12304 12305 8D 12306 5A 12307 92 12308 C5 SI = EF80H SI = 80EFH

20. Suppose we have just found yet another representation for floating point numbers. Using this representation, a li2-bit floating point number has 1 bit for the sign of the number, 4 bits for the exponent and 7 bits for the mantissa, which is normalized as in the Simple Model so that the first digit to the right of the radix points must be a 1. Numbers in the exponent are in signed 2's complement representation. No bias is used and there are no implied bits. Show the representation for the smallest positive number this machine can represent using the following format (simply fill in the squares provided). What decimal number does this equate to? : SIGN EXPONENT MANTISSA

Assume that the content of A is $A7 and that the content of B is $20. Find the contents of A and B after the MUL instruction is executed. [Hint: The MUL instruction assumes that the contents of A and B are unsigned integer values.]

Which system has a base 16? A. Octal B. Decimal C. Hexadecimal D. Binary