| 摘要 |
<p>PURPOSE:To alter program easily, by executing a correcting program stored on the basis of stored information for the alternation of the program. CONSTITUTION:A CPU1 advances steps of a program in a mask ROM2 successively unless an interruption signal as the set output of a flip-flop 12 arrives. When the address position of the mask ROM2 reaches an address position where the program is altered, a memory RAM3 outputs 1 to set the flip-flop 12 and interruption is caused to makes a jump to a correcting program position. Once this correcting program is executed, the flip-flop 12 is reset and a jump to the area of the mask ROM2 is made to execute the program the program in the mask ROM2 again.</p> |
