DOS
Provisionally treating DOS as a disk operating system, this model enables an agent to identify a DOS environment, assess its usability and compatibility, and determine which operations it can safely perform.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
Researched by: Codex
Purpose and description
Provisionally treating DOS as a disk operating system, this model enables an agent to identify a DOS environment, assess its usability and compatibility, and determine which operations it can safely perform.
It can be Inspect version evidence and system components to identify the DOS implementation.; Trace boot and startup processing to locate a failure.; Evaluate whether a specified executable can run with the available services and memory.; Resolve DOS paths to their backing storage before performing authorised file operations.; Inspect and adjust startup configuration or driver loading with a recovery route.; Run supported commands and batch files after checking interpreter behaviour and write targets..
Distinguishing features
Confirm that DOS names an operating system in the originating registry context; acronym spelling alone does not establish the referent.
Distinguish a DOS operating environment from a command prompt by establishing which system supplies its program-loading and operating-system services.
Distinguish an installed system from an installation disk or disk image by recording whether the referent is software, its physical carrier or a runnable environment.
Distinguish implementations and releases through component evidence and observed behaviour rather than treating every DOS-labelled environment as interchangeable.
Distinguish native boot, emulation and a host-provided compatibility environment because identical commands can operate under different constraints.
Scope
+ DOS implementation, release and installation identity
+ Boot sequence, system components and command interpreter
+ Drive addressing, filesystem behaviour and file attributes
+ Executable compatibility and memory requirements
+ Drivers, startup configuration and session state
- Physical computer construction and hardware condition
- Storage-device manufacture, wear and physical repair
- Application-specific functionality and user documents
- Emulator implementation and host operating-system administration
- Denial-of-service events or other concepts abbreviated DOS
Characteristics
- Referent interpretation
- disk-operating-system interpretation confirmed | provisional | rejected Prevents an acronym-based assumption from becoming an authoritative model of the wrong registered thing.
- Implementation and release
- Evidence-supported implementation name, release and component variants; unknown permitted Determines which commands, configuration rules and compatibility expectations apply.
- Execution context
- native boot | emulator | virtual machine | host compatibility environment | offline installation | unresolved Identifies which system controls devices, memory and recovery.
- Boot progress
- not attempted | boot failure | startup configuration failure | command interpreter available | application running | unresolved Separates failure to start the operating system from failure to start an application.
- Command interpreter
- Identified interpreter executable, version evidence and invocation configuration Command syntax and batch behaviour depend on the interpreter actually in use.
- Available program memory
- Bytes available by supported memory class, including largest allocatable conventional-memory block where applicable A program may fail despite sufficient installed RAM if the required memory class or contiguous block is unavailable.
- Drive-letter mapping
- Drive letter to volume, image, removable medium, network resource or host mapping A path must be resolved to its actual target before reading, modifying or deleting files.
- Filesystem and filename capabilities
- Observed filesystem formats, filename rules, attributes and implementation-specific extensions Controls whether files can be addressed, transferred and modified without losing meaning or data.
Also called
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
DOS identity and context Establishes what DOS denotes and which operating environment is being assessed.
The undefined acronym and physical-object classification make referent confirmation essential before applying operating-system assumptions.
Registry referent
Connects the registered name to an evidenced meaning.
DOS meaning and boundary
Record evidence establishing whether DOS denotes an operating system, a physical carrier or another thing.
- What originating registry context establishes the intended meaning of DOS? provenance
- Does PHY / PHY.OBJ describe the intended thing, its carrier, or a classification error? boundary
Implementation context
Identifies the implementation and the system supplying its execution services.
Implementation and runtime
Record implementation evidence separately from reported version strings and hosting conditions.
- Which implementation and release are supported by the installed system components? provenance
- Which services come from DOS itself, and which come from an emulator, virtual machine or host compatibility environment? boundary
Boot and startup Captures the path from the boot source to a usable command interpreter or application.
DOS usability depends on the boot components and startup choices actually activated.
Boot chain
Identifies the selected boot source and the last successful startup stage.
Boot source and progress
Record the boot target, required components and observable point of failure.
- Which volume or image supplies the boot components for this DOS environment? provenance
- What is the last confirmed successful stage before a boot failure or usable prompt? measurement
Startup configuration
Captures interpreter selection and configuration-driven startup behaviour.
Effective startup sequence
Record the startup files and selected branches that load drivers, set the environment and launch commands.
- Which configuration and batch files are processed, in what order, by this implementation? definition
- How can a suspect startup command or driver be bypassed while preserving a recoverable boot path? action
DOS storage and paths Captures how drive letters, directories and filesystem rules identify data.
DOS file operations require an accurate mapping from command-visible paths to backing storage.
Drive resolution
Resolves drive letters and relative paths within the current session.
Effective path target
Record drive mappings and directory context sufficient to determine a command's actual file target.
- What backing volume, image or redirected resource does each relevant drive letter identify? boundary
- How do the current drive and directory state resolve the exact path supplied to the proposed command? measurement
Filesystem behaviour
Captures supported naming, attributes and storage constraints.
File operation constraints
Record the filesystem and implementation rules that affect file access and mutation.
- Which filename, attribute and volume-size rules apply to the target volume in this environment? definition
- Will the proposed copy, rename or deletion encounter unsupported names, write protection or insufficient free space? action
Program execution and resources Determines whether commands and programs can execute under the available DOS services and resource configuration.
A working prompt does not establish application compatibility or adequate program memory.
Program compatibility
Connects a particular executable or batch file to its required execution behaviour.
Executable service fit
Record program requirements for executable loading, system services, processor features and interpreter behaviour.
- What executable format, DOS services, processor capabilities or runtime extensions does the target program require? definition
- What controlled execution check would establish compatibility without risking the program's working data? action
Memory and resident components
Captures usable memory and the effects of loaded drivers and resident programs.
Usable program resources
Record available memory by relevant class and identify loaded components affecting execution.
- How much memory is available in each class required by the program, and what is the largest usable conventional-memory block where applicable? measurement
- Which driver or resident-program changes could satisfy the requirement, and which required services would those changes remove? action
What the second pass must settle
- Does DOS actually mean disk operating system in this registry, or does the PHY / PHY.OBJ placement identify a different physical thing?
- If the operating-system interpretation is confirmed, does the entry cover a family of systems, a particular implementation, an installation or a running instance?
- Does an existing Vercy world model already own this concept, requiring a registry link rather than another publication?
- Which implementation-specific sources must be read to establish boot, filesystem, memory and command behaviour without generalising across incompatible DOS variants?
- Should installation media and bootable disk images be related neighbouring things, and where does the registry place their ownership boundary?