Epson 500 Series - Manual (Page 102)

Input Devices
Keyboard 84/85 (US) keys; embedded numeric keypad
and F11 and F12 keys
Trackball Portable trackball with drivers and utilities
installed
Mass
Storage
Diskette drive One internal, 3.5 inch diskette drive; 1.44MB
and 720KB formats
Hard disk drive One internal hard disk drive; must be 2.5
inches wide, 15.5 mm high maximum, with AT
interface and MCC mounting holes on the side
Display
Color LCD 640 x480 (256 colors) 0.3 mm, high-contrast
two-film; passive matrix, paper-white. backlit
by one coded cathode fluorescent tube
(CCFT); continuous brightness and contrast
controls; power-saving feature; brightness and
contrast enhancement
Power Supply
AC adapter
Battery pack
+15.5VDC, 2.4A continuous AC adapter with
Rechargeable, internal battery pack; 8-cell,
Specifications C-3