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Everything about DOS API

API of the MS-DOS operating system

The DOS API is an API which originated with 86-DOS and is used in MS-DOS/PC DOS and other DOS-compatible operating systems. Most calls to the DOS API are invoked using software interrupt 21h. By calling INT 21h with a subfunction number in the AH processor register and other parameters in other registers, various DOS services can be invoked. These include handling keyboard input, video output, disk file access, program execution, memory allocation, and various other activities. In the late 1980s, DOS extenders along with the DOS Protected Mode Interface (DPMI) allow the programs to run in either 16-bit or 32-bit protected mode and still have access to the DOS API. Wikipedia →

🧭 Start here: a 6-step reading path

  1. Read the overview: DOS APIA 5-minute orientation
  2. Skim a recent paper: Continuous Spatiotemporal Therapy of A Full-API Nanodrug via Multi-Step Tandem Endogenous BiosynthesisInfluential work since 2022
  3. Pick up a classic book: Momo oder Die seltsame Geschichte von den Zeit-Dieben und von dem Kind, das den Menschen die gestohlene Zeit zurückbrachteThe most-reprinted book on the subject
  4. Read the landmark paper: Uma breve revisão histórica do desenvolvimento da soldagem dos aços API para tubulaçõesCited 10 times
  5. Go sideways: DOS Protected Mode InterfaceA closely related topic
  6. Go sideways: Virtual DOS machineA closely related topic

📖 Definitions

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🗂️ The subject at a glance

  1. History of the DOS API
  2. The DOS API and Windows
  3. Interrupt vectors used by DOS
  4. DOS INT 21h services
  5. Operating systems with native support
  6. Operating systems with DOS emulation layer
  7. Other emulators

🏆 Landmark papers (most cited)

🆕 Influential since 2022

📚 Books worth reading

Ranked by number of editions on Open Library, a rough measure of how lasting a book is.

🔗 Related topics