Answers to Sample Exam

1. c

2. a

3. c

4. b

5. 1. -1.01101 x 2¹⁰²
   2. +Infinity
   3. NaN
   4. 0.01101 x 2^-126 = 1.101 x 2^-128
6. 1. 00000 .. 11111
      0 .. 31
   2. 1111111 .. 0111111
      -63 .. 63
   3. 100000 .. 011111
      -32 .. 31
   4. 0000 .. 1111
      -7 .. 8
7. 1. 000 0110
   2. 101 1110
   3. 100 1010 C=0 V=1
   4. 100 0001 C=0 V=1
   5. 000 0110 C=1 V=0
   6. 111 0001 C=1 V=N/A
   7. 1010100
   8. 1010011

8. F900

9. These answers have been adjusted to Pep/8 equivalents, even though the questions are in Pep/7 syntax.

   1. 0600A7
   2. 00000000
   3. 1D
   4. none
   5. F5
   6. 58 (but Pep/8 requires an operand)
   7. 000C
   8. C3FFFE
   9. 4869
   10. 310032
   11. 00
   12. none

10. f - direct          c - indirect
    b - immediate    a - stack-relative
    d - indexed       e - stack-relative deferred
11. c - not p    a - p and q    b - p or q    d - p nor q
12. Yes
    No
    No
    Yes
    No

13.  

14. 1.  
    2.  
    3. Four of:
          ab    aab    aaa...ab
          b
          cab    caab    caa...ab
          cb

15.     ;;
        ;; void calcOvt( int reg, int & ovrtm )
        ;;
        reg:      .EQUATE 4
        ovrtm:    .EQUATE 2
        ;;
        calcOvtm: LDA     reg,s      ; calculate 1/2 reg plus reg
                  ASRA
                  ADDA    reg,s
                  STA     ovrtm,sf   ; store result in ovrtm
                  RET0
    

16.  

17. 1. a'b' + c'
    2. a'c + bc
    3. b'd' + a'd' + bc'd + b'c
18. 1.  
    2.  

       A	B	0	1
       0	0	00,0	11,0
       0	1	11,0	00,0
       1	0	11,0	10,0
       1	1	00,1	11,1

    3.  

19.