Debug (command)

DEBUG.COM (MS-DOS <= 2.0), DEBUG.EXE (MS-DOS >= 3.x)
Original author(s)	Tim Paterson
Developer(s)	Microsoft, IBM, Digital Research, Novell, Caldera
Written in	MS-DOS: x86 assembly language
Operating system	DOS, OS/2, Windows
Type	Debugger
License	MS-DOS v2.0, FreeDOS: MIT; OS/2, Windows: Proprietary software
Website	Debug

The line-oriented debugger DEBUG.EXE is an external command in operating systems such as DOS, OS/2 and Windows (only in 16-bit/32-bit versions).

DEBUG can act as an assembler, disassembler, or hex dump program allowing users to interactively examine memory contents (in assembly language, hexadecimal or ASCII), make changes, and selectively execute COM, EXE and other file types. It also has several subcommands which are used to access specific disk sectors, I/O ports and memory addresses.

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