Datapoint (01-459 1222) has become the latest big-league computer maker to launch a PC,and like Burroughs before it the Texas-based corporation has picked Convergent Technology's 80186 N-Gen to fly its flag. Calling its machine the Vista-PC, Datapoint has made standard some of the features that other makers don't reach - such as a colour monitor with 720 by 348 resolution. There's 256K of RAM and on-line storage canrun to 40Mb. The system runs MSDOS 2.11, Convertent Technology's proprietary operating system, CTOS, or GW-Basic, and diagnostics to pin level are included in the base price of £3,750.