gistfile1.txt

CLR R5
 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0     N 0
                                     Z 0
                                     V 0 
                                     C 0

SEC
 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0     N 0
                                     Z 0
                                     V 0 
                                     C 1
                                     
ASL

First, the high order bit is removed
 V
   0 0 0 0 0 0 0 0 0 0 0 0 0 0 0     N 0
                                     Z 0
                                     V 0 
                                     C 1
                                     
Then, all the other bits are shifted left
 
 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0       N 0
                                     Z 0
                                     V 0 
                                     C 1
                                     
FInally, the carry bit is set as the low order bit
 
 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0  1  N 0
                                     Z 0
                                     V 0 
                                     C 1