en:docs:dos:api

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en:docs:dos:api [2018/09/07 03:13] – prokusheven:docs:dos:api [2023/12/18 07:07] (current) – prokushev
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 ====== DOS API ====== ====== DOS API ======
  
-Most of DOS API are invoked using software interrupt INT 21H. In most cases AH register sets to function number.+Most of DOS API calls are invoked using software interrupt INT 21H. In most cases AH register are set to function number.
  
 ===== DOS Interrupts ===== ===== DOS Interrupts =====
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 ^ Interrupt vector ^ Description ^ Version ^ Notes ^ ^ Interrupt vector ^ Description ^ Version ^ Notes ^
 | [[en:docs:dos:api:int20|20H]]| Terminate program | 1.0+ | Implemented in DOS kernel | | [[en:docs:dos:api:int20|20H]]| Terminate program | 1.0+ | Implemented in DOS kernel |
-| [[en:docs:dos:api:int21|21h]] | Main DOS API | 1.0+ | Implemented in DOS kernel | +| [[en:docs:dos:api:int21|21H]] | Main DOS API | 1.0+ | Implemented in DOS kernel | 
-| 22h | Program terminate address | 1.0+ | Return address in calling program | +| [[en:docs:dos:api:int22|22H]] | Program terminate address | 1.0+ | Return address in calling program | 
-| 23h | Control-C handler address | 1.0+ | Default handler is in the command shell (usually COMMAND.COM) | +| [[en:docs:dos:api:int23|23H]] | Control-C handler address | 1.0+ | Default handler is in the command shell (usually COMMAND.COM) | 
-| 24h | Critical error handler address | 1.0+ | Default handler is in the command shell (usually COMMAND.COM) | +| [[en:docs:dos:api:int24|24H]] | Critical error handler address | 1.0+ | Default handler is in the command shell (usually COMMAND.COM) | 
-| 25h | Absolute disk read | 1.0+ | Implemented in DOS kernel, enhanced in DOS 3.31 to support up to 2 GB partitions | +| [[en:docs:dos:api:int25|25H]] | Absolute disk read | 1.0+ | Implemented in DOS kernel, enhanced in DOS 3.31 to support up to 2 GB partitions | 
-| 26h | Absolute disk write | 1.0+ | Implemented in DOS kernel, enhanced in DOS 3.31 to support up to 2 GB partitions | +| [[en:docs:dos:api:int26|26H]] | Absolute disk write | 1.0+ | Implemented in DOS kernel, enhanced in DOS 3.31 to support up to 2 GB partitions | 
-| 27h | Terminate and stay resident | 1.0+ | Implemented in COMMAND.COM in DOS 1.0, DOS kernel in DOS 2.0+ | +| [[en:docs:dos:api:int27|27H]] | Terminate and stay resident | 1.0+ | Implemented in COMMAND.COM in DOS 1.0, DOS kernel in DOS 2.0+ | 
-| 28h | Idle callout | 2.0+ | Called by DOS kernel when waiting for input | +| [[en:docs:dos:api:int28|28H]] | Idle callout | 2.0+ | Called by DOS kernel when waiting for input | 
-| 29h | Fast console output | 2.0+ | Implemented by the builtin console device driver or a replacement driver like ANSI.SYS | +| [[en:docs:dos:api:int29|29H]] | Fast console output | 2.0+ | Implemented by the builtin console device driver or a replacement driver like ANSI.SYS | 
-| 2Ah | Networking and critical section | 3.0+ | Called by DOS kernel to interface with networking software | +| [[en:docs:dos:api:int2A|2AH]] | Networking and critical section | 3.0+ | Called by DOS kernel to interface with networking software | 
-| 2Eh | Reload transient | 2.0+ | Implemented in COMMAND.COM | +| [[en:docs:dos:api:int2E|2EH]] | Reload transient | 2.0+ | Implemented in COMMAND.COM | 
-| 2Fh | Multiplex | 3.0+ | Implemented in DOS kernel and various programs (PRINT, MSCDEX, DOSKEY, APPEND, etc.) depending on subfunction number |+| [[en:docs:dos:api:int2F|2FH]] | Multiplex | 3.0+ | Implemented in DOS kernel and various programs (PRINT, MSCDEX, DOSKEY, APPEND, etc.) depending on subfunction number |
  
  
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