In this paper, we present a primitive artificial brain developed in our laboratory, which is used in a mobile vehicle. This primitive artificial brain consists of the 32-bit Von Neumman type microcomputer NEC PC-9821Ap/U7, the RICOH neurocomputer RN-2000, the interface PIO 32/32, the software for constructing a neural network and learning, and the software for steering angle of the front wheels. Details are given about how to use the primitive artificial brain to control the steering action of the mobile vehicle. (C) 2000 Elsevier Science Inc. All rights reserved.