2500

The Turtle Terminal 2500 was a 16-bit minicomputer terminal designed by Marvin Minsky; it was initially just named the '2500' (for the target price). It had dual displays: one for text, and another for vector graphics. It was meant to run microcode to implement Logo, but the size of the firmware RAM precluded that. Danny Hillis wrote firmware to emulate a Datapoint 3300 terminal, with additional commands for turtle graphics. 2500's were typically attached to a host running Logo: the SITS PDP-11/45, an LSI-11 based machine called the General Turtle 3500, or Unix.