Two debugging aids for developers of applications and systems software on PDP-11 series computers are described. Both debuggers are extensions of Digital Equipment Corporation's ODT (Octal Debugging Technique), and are based on an undocumented, unsupported debugger obtained through DEC. The intent of this paper is to describe these debuggers in a functional sense, discuss the modifications made at LLL to enhance the operation of these debuggers, and to serve as a user's manual for persons developing PDP-11 software. (ERA citation 04:007164)
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