• DS15 PSU 400W 11/70 extended instruction set - • Memory-management unit • 512-Kbyte memory • Time-of-day clock with battery backup • Bit-mapped video control • DS15 PSU 400W -C serial printer port • Asynchronous and bit or byte synchronous communications port, up to 9600 baud with full modern control • DS15 PSU 400W -compatible, monochrome bit-mapped video output • Built-in diagnostic firmware with graphics display • Switch- DS15 PSU 400W selectable (115-V or 230-V) universal power supply • 13.3-cm (5.25-in) 800-Kbyte dual diskette drive and controller • Standard floating-point adapter providing up to seventeen digits of precision • An NI port to support PRO/DECnet The Professional 380 has five option slots open for system expansion. Adding additional memory to the Professional 380 increases overall system Per- formance by enabling larger programs to reside in memory. The Professional 380 can be extended up to 1 Mbyte with the 512-Kbyte memory option module that is designed to reside an the system module, and then up to 2 Mbytes by adding 256- DS15 PSU 400W options.