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MS-DOS v1.25 and v2.0 source code; There are several guides to DOS commands available that are licensed under the GNU Free Documentation License: The FreeDOS Spec at SourceForge is a plaintext specification, written in 1999, for how DOS commands should work in FreeDOS; MS-DOS commands; Reference for windows commands with examples
The category Internal DOS commands deals with articles about DOS commands built into the command processor (COMMAND.COM, 4DOS.COM, NDOS.COM, ... Code of Conduct;
The category DOS commands deals with articles related to internal and external commands supported by members of the family of DOS compatible operating systems for IBM PC compatible computers, such as MS-DOS, PC DOS, DR DOS, Concurrent DOS, Multiuser DOS, REAL/32, FlexOS, Novell DOS, PalmDOS, OpenDOS, FreeDOS, RxDOS, ROM-DOS, Embedded DOS, etc.
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.
Code page 437 (CCSID 437) is the character set of the original IBM PC (personal computer). [2] It is also known as CP437, OEM-US, OEM 437, [3] PC-8, [4] or DOS Latin US. [5] The set includes all printable ASCII characters as well as some accented letters (), Greek letters, icons, and line-drawing symbols.
IBM and Microsoft announce a long-term joint development agreement to share specified DOS code and create a new multitasking operating system from scratch, known by various code names: CP-DOS, 286DOS, DOS 5, New DOS, or Advanced DOS (OS/2 would eventually be released in late 1987). The pact was signed in June.
The default OperandSize and AddressSize to use for each instruction is given by the D bit of the segment descriptor of the current code segment - D=0 makes both 16-bit, D=1 makes both 32-bit. Additionally, they can be overridden on a per-instruction basis with two new instruction prefixes that were introduced in the 80386:
Pages in category "DOS code pages" The following 46 pages are in this category, out of 46 total. This list may not reflect recent changes. 0–9. Code page 0;