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DOSBox is a command-line program, configured either by a set of command-line arguments or by editing a plain text configuration file. For ease of use, several graphical front ends have been developed by the user community.
SetVer is a TSR program designed to return a different value to the version of DOS that is running. This allows programs that look for a specific version of DOS to run under a different DOS. The command is available in MS-DOS versions 5 and later. [1]
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.
On Linux, it is possible to run DOSEMU, a Linux-native virtual machine for running DOS programs at near native speed. There are a number of other emulators for running DOS on various versions of Unix and Microsoft Windows such as DOSBox. [26] [27] DOSBox is designed for legacy gaming (e.g. King's Quest, Doom) on modern operating systems.
Virtual DOS machines can operate either exclusively through typical software emulation methods (e.g. dynamic recompilation) or can rely on the virtual 8086 mode of the Intel 80386 processor, which allows real mode 8086 software to run in a controlled environment by catching all operations which involve accessing protected hardware and forwarding them to the normal operating system (as exceptions).
According to its manual, "dosemu" is a user-level program which uses certain special features of the Linux kernel and the 80386 processor to run DOS in a DOS box. The DOS box, relying on a combination of hardware and software, has these abilities: Virtualize all input-output and processor control instructions
dbDOS is software developed by dBase for Windows computers with Intel processors. dbDOS allows Intel-based PCs to run DOS Applications, such as dBASE III, dBASE IV (Version 1, 2, 3), and dBASE V for DOS in an emulated DOS environment. It is an environment configured specifically to allow the various versions of dBASE for DOS to run without any ...
In DOSBox, the command is used to view and set the reported DOS version. It also displays the running DOSBox version. The syntax to set the reported DOS version is the following: VER SET <MAJOR> [MINOR] The parameter MAJOR is the number before the period, and MINOR is what comes after. Versions can range from 0.0 to 255.255.