| Phase | Date | Memo | 
|---|---|---|
| えんでこ phase 1.0 | 2001-02-01 | 
 | 
| phase 2.0 | 2001-02-04 | 
 | 
| phase 3.0 | 2001-02-06 | 
 | 
| phase 4.0 | 2001-02-08 | 
 | 
| phase 5.0 | 2001-02-10 | 
 | 
| phase 6.0 | 2001-02-14 | 
 | 
| DGPエンコーダ V1.00 | 2003-06-15 | 
 | 
| 2010-11-01 | 
 | |
| 2012-06-30 | 
 |