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Assignment 9-Cont. - 14100_456
Assignment 9-Cont. - 14100_458

Fire Controlman Volume 03-Digital Data Systems
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9-23. In a 16-bit microcomputer instruction, in what positions is the operation code located? 1. Bits 25 and 24 2.  Bits  211 and  210 3. Bits 215 through  213 4. Bits 216 through  213 9-24. The formats of instructions on mainframe computers vary greatly for all of the following reasons except which one? 1.  Manufacturer  of  the  computer 2.  Generation  of  the  computer 3. Memory size of the computer 4. Type of computer QUESTIONS 9-25 THROUGH 9-33 PERTAIN TO THE EXAMPLE INSTRUCTION FORMATS FOR A MAINFRAME  COMPUTER  WITH  32-BIT INSTRUCTIONS ON PAGES 8-8 THROUGH 8-10 IN THE TRAMAN. 9-25. A total of how many basic instruction formats is given? 1.  One 2.  Five 3.   Seven 4.  Nine 9-26. Which of the following fields is/are consistent in all the instruction formats? 1. Designator field (a) only 2.  Function  code  (f)  only 3. Designator field (a) and function code (f) 4. Function code (f) and subfunction code (f2) 9-27. The “a” field is used to identify all except which of the following registers? 1. Stack pointer 2.  Accumulator 3.  Memory 4.   Index 9-28. Basic load, store, replace, and simple mathematical operations are performed using what instruction format? 1.   I 2.   II 3.   IV-B 4.  V 9-29, 9-30, 9-31. 9-32. 9-33. Format II instructions perform all except which of the following types of operations? 1.  Interrupt 2. I/O commands 3.  Single  precision  mathematics 4. Program sequence control jumps What is the maximum value of a subfunction code of (a) two bits and (b) three bits? 1.  (a)  2  (b)  3 2.  (a)  2  (b)  7 3.  (a)  3  (b)  5 4.  (a)  3  (b)  7 Formats IV-A and IV-B are half-word instructions and two of them may be stored in one memory word. Which of the following methods is used to keep track of upper/lower instruction execution? 1. Active status register 2.  Indirect  addressing  mode 3. Monitor clock 4.  Accumulator For operations such as setting, clearing, or testing an individual bit, what instruction format is used? 1.   IV-B 2.   IV-C 3.   III 4.   II For single- and double-precision floating-point math operations, what instruction format should be used? 1.   I 2.   II 3.   III 4.  V 61






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