Values for Operand1 and Operand2 to test Project #1 circuits

     Operand1          Operand2         RES = (Operand2-Operand1)*4               OVF

1.     0                        0                      0                                                            No
2.    20                      20                     0                                                            
No
3.    40                      10                   -120                                                         
No
4.    10                      40                    120                                                          No
5.    30                     -10                  [-160]                                                       
Yes (after *4)
6.   -66                      66                  [ 528]                                                        Yes (before *4)
7.   -20                     -10                    40                                                           No
8.    42                      10                   -128                                                         
No
9.   -10                      21                    124                                                          No
10. -22                      10                    128                                                         
Yes (after *4)
11.  66                     -66                  
[-528]                                                        Yes (before *4)