| 摘要 |
<p>PURPOSE:To write the different serial numbers to each PROM by writing the contents of an ID register in place of those of a master ROM buffer memory when the value of an address generator is coincident with that of an ID address register and adding 1 to the content of the ID register. CONSTITUTION:A comparator 6 compares an ID address register 5 with an address signal 301 received from an address generator 3 and a coincidence signal 601 is turned on when the coincidence is obtained from said comparison. At the same time, an ID register 7 stores the ID information to be written and also adds the value by 1 with an addition signal 403 received from a write control part 4. A multiplexer 8 selects the value 701 of the register 7 or the data 101 on a master ROM after memory 1 by the signal 601 given from the comparator 601. Then the value 701 is selected when the signal 601 is ON and sent to an PROM set into a target ROM inserting part 2. Thus the different serial numbers can be easily written into each PROM.</p> |
