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Extracted text: Table A.2 Code for computing la - b| Exercises Symbolic code Machine code 1. Although we have not yet described division in our miniature computer, let us assume that a quotient p÷ q (the integral part) may be obtained by the code sequence that corresponds to Instruction Addresst Instruction Address name Start CLA P START RDS A 09 701 DIV Q RDS B 10 702 CLA A 11 101 The resulting quotient will be found in the three lowest-order positions of the АСС. Write a sequence of symbolic codes and corresponding machine codes that will compute the value SUB B STO C TMI NEG PRT C TRA START 302 403 017 803 909 102 301 403 915 12 13 14 AGAIN 15 16 а — b, y = a+ b, CLA B SUB A NEG 17 18 b. Draw a picture of the storage cells showing all instructions and locations for original or intermediate results. You must make certain decisions, such as where STO C 19 TRA AGAIN 20 to keep a, b, and y in storage and at what location to begin the program. Hint: Before the division can be carried out, both the numerator and the denominator must be computed. At least one of these must be saved, in a place that you will have to designate, while the other is being computed. t We are assuming the following: (1) Instructions begin at 09. (2) A at 01, B at 02, C at 03. eea-b 2. After completing Exercise 1, write a sequence of instructions that reads a pair of values for a and b from punch cards, computes y, prints it, and returns to read another pair of values. T. e<0 3.="" assume="" that="" a="" product="" p="" x="" q="" may="" be="" obtained="" by="" the="" code="" sequence="" that="" cor-="" responds="" to="" negative="" cla="" p="" mpy="" q="" write="" a="" code="" sequence="" to="" compute="" the="" following.="" ceb-a="" a)="" d="ªXb" a="" b)="" c="bx" c="" print="" fig.="" a.10="" flowchart="" for="" computing="" a-="">
Extracted text: Exercises: 1. Write a program that will read two values, a and b, and will print the quantity a+b and then loop to read another pair of values. a-b 2. Write a program that will read three values, a, b, and c, and compute a*b and a b*c' 3. Write a program that will read a number and print its absolute value. In all three of the above programs, write the assembly code first, then write the machine code, then place the code into computer memory.