Toshiba announced this notebook computer with a 2.5-inch magnetic disk unit in 1990.
| External dimensions [mm] and weight | 310 x 254 x 44 (w x d x h), 2.8 kg |
|---|---|
| Power supply | Battery, or 100 - 240 VAC |
| Power consumption | 40W |
| CPU | 80C86 |
| Memory | 1 MB, standard; 3 MB max. |
| Screen | LCD screen with a FL backlight 640 x 400 pixels |
| Storage memory devices | Floppy drive: 3.5-inch (1.44 MB / 1.2 MB/ 720 KB), external Hard drive: 2.5-inch, 20 MB |
| Interfaces | RS-232C, printer interface (Centronics) |
| OS | Japanese version of MS-DOS V. 3.1 |


![DynaBook J-3100 SS02E<br> Courtesy of Shun Kinoshita’s "Khuns no Shosai" Web site [http://www.hi-ho.ne.jp/skinoshita/]](http://museum.ipsj.or.jp/computer/personal/images/0064_01.gif)