EPSON NB3spower an optional full-size keyboard.Hard Disk Interchangeable, slide-out 120MB hard disk;19 ms average access time; built-incontroller.Option Slots Two standard I/O expansion slots, 8/16-bitISA-compatible.Dimensions ( W x D x H ) m m297 x 284 x 43 (front); 92.8 (rear)Approximately 3.75 Ibs., 1.7 kgPower Supply Automatic 100-240 V sending, 50/60 Hz.Supplies enough power to operate thecomputer, recharge the battery pack andVideo Controller SwitchIf you wish to install a video card in the NB3s Expansion Unit,you must disable the onboard video controller. To do this, setthe video switch to the EXT position. The video switch islocated beneath the connector in the expansion unit’s rearoption slot.In addition, you must check the position of the DIP switchlocated in the slot for the optional coprocessor and RAM card.Remove the RAM card, if installed. The DlP switch isimmediately below the BlOS chip. If you are installing a colorvideo card, be sure that DIP switch 1 is OFF. If you-installing a monochrome video card, be sure that DIP switch 1is ON.DIPSblockNB3s-6 11/30/90 Notebook Computers