!!!Dunion's Debugging Tool (DDT) Rev. 1.0, Copyright (C) 1982, 1983 by James J. Dunion and Optimized Systems Software, Inc. !!ATR-Image: * [DDT-Dunions_Debugging_Tool.atr] ATR-Image of the Debugger Loading instructions:\\ - choose option L from DOS\\ - type SHELL1.OBJ\\ - press RETURN\\ !!Manual: * [Dunion's Debugging Tool (DDT) Rev. 1.0 manual|DDT_1.0_Manual.pdf] (C) 1984 by James J. Dunion and Optimized Systems Software, Inc.