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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 [1]).. 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.
Choice was introduced as an external command with MS-DOS 6.0; [1] [2] Novell DOS 7 [3] and PC DOS 7.0. Earlier versions of DR-DOS supported this function with the built-in switch command (for numeric choices) or by beginning a command with a question mark. [3] This command was formerly called ync (yes-no-cancel).
MS-DOS 4.0 [a] was a multitasking release of MS-DOS developed by Microsoft based on MS-DOS 2.0. Lack of interest from OEMs , particularly IBM (who previously gave Microsoft multitasking code on IBM PC DOS included with TopView ), led to it being released only in a scaled-back form.
It would be nice if this article just focussed on "commands found in the MS DOS operating systems from MS DOS 1.0 through MS DOS 5.0 " or whatever the last free-standing DOS version was. Also, this article doesn't distinguish between commands that are only useful within batch files and those that are actually used at the command line.
MS-DOS 5.0 came in April 1991, and DR DOS 6.0 was released the following June. [90] These products are collectively referred to as "DOS", even though "Disk Operating System" is a generic term used on other systems unrelated to the x86 and IBM PC. "MS-DOS" can also be a generic reference to DOS on IBM PC compatible computers.
COMMAND.COM, the original Microsoft command line processor introduced on MS-DOS as well as Windows 9x, in 32-bit versions of NT-based Windows via NTVDM; cmd.exe, successor of COMMAND.COM introduced on OS/2 and Windows NT systems, although COMMAND.COM is still available in virtual DOS machines on IA-32 versions of those operating systems also.
Retrieved from "https://en.wikipedia.org/w/index.php?title=DEBUG_(DOS_Command)&oldid=207631329"This page was last edited on 23 April 2008, at 15:54
DOSBox is a free and open-source emulator which runs software for MS-DOS compatible disk operating systems—primarily video games. [5] It was first released in 2002, when DOS technology was becoming obsolete. Its adoption for running DOS games is widespread, with it being used in commercial re-releases of those games as well.