This directory MMS/mdl/arm2d contains a 2D arm model developed by Dimitra Blana in the laboratory of Bob Kirsch at CWRU. It is named DAS1 (Dynamic Arm Simulator 1). The Kirsch group is using the model with a Simulink interface for real-time simulation. The simulink interface can be obtained from the Kirsch lab. Here we only provide a C/C++ interface (the subfolder "armsim"). Contents: das1.sd Input file for SD/Fast, contains bone lengths and mass properties das1_d.c C code with equations of motion, generated by SD/Fast das1_i Information file, generated by SD/Fast das1.bio File with muscle models. armsim/ Code for C/C++ interface, used in Reinforcement Learning project to simulate environment