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The command is available in MS-DOS versions 4 and later and DR DOS releases 5.0 and later. [1] On earlier DOS versions the memory usage could be shown by running CHKDSK. In DR DOS the parameter /A could be used to only show the memory usage.
MS-DOS / PC DOS and some related disk operating systems use the files mentioned here. System Files: [1] IO.SYS (or IBMBIO.COM): This contains the system initialization code and builtin device drivers; MSDOS.SYS (or IBMDOS.COM): This contains the DOS kernel. Command-line interpreter (Shell): COMMAND.COM: This is the command interpreter.
The command produces summary output of hardware/software operating environment parameters. [2] The detailed configuration information about the computer and its operating system includes data on the operating system configuration, security information, product ID, and hardware properties, such as RAM, disk space, and network cards. [3]
MS-DOS versions 5.x and later use chkdsk.exe as the executable file. [8] CHKDSK can also show the memory usage, this was used before the command MEM.EXE was introduced in MS-DOS 4.0 to show the memory usage. In DR DOS the parameter /A limited the output to only show the memory usage.
Alternatively, under Multiuser DOS and DR-DOS 7.02 and higher, various internal and external commands support a parameter /B (for "Batch"). [5] This modifies the output of commands to become suitable for direct command line input (when redirecting it into a batch file) or usage as a parameter for other commands (using it as input for another ...
In DOS 1.x, it was necessary for the CS (Code Segment) register to contain the same segment as the PSP at program termination, thus standard programming practice involved saving the DS register (since the DS register is loaded with the PSP segment) along with a zero word to the stack at program start and terminating the program with a RETF instruction, which would pop the saved segment value ...
For example, MS-DOS 4, released in July 1988, was followed by DR DOS 5.0 in May 1990. 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.
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.