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Ci-dessous, les différences entre deux révisions de la page.

--- back2root:ibm-pc-ms-dos:interrupts:int_21:int_21_51 [2023/01/10 11:55] – supprimée - modification externe (Unknown date) 127.0.0.1
+++ back2root:ibm-pc-ms-dos:interrupts:int_21:int_21_51 [2024/04/08 01:03] (Version actuelle) – ↷ Liens modifiés en raison d'un déplacement. 185.191.171.14
@@ Ligne 1: / Ligne 1: @@
+====== INT 0x21 - 0x51 - Get Current Process ID ======
+<WRAP round info>
+Undocumented DOS 2.x
+</WRAP>
+===== Request/Call: =====
+{{tablelayout?rowsHeaderSource=Auto&colwidth=""}}
+^  reg  ^  value  ^  descr  ^
+|  AH   |  0x51   |         |
+===== Return: =====
+{{tablelayout?rowsHeaderSource=Auto&colwidth=""}}
+^  reg  ^   descr  ^
+|   BX  | process ID |
+===== Notes & Comments =====
+<WRAP round box>
+  * The process ID number is actually the segment address of program's PSP. This in conjunction with [[back2root:ibm-pc-ms-dos:interrupts:int_21:int_21_50|INT 21,50]] is useful for TSR's to access their own file handle table in their respective [[back2root:ibm-pc-ms-dos:hardware:informations:program_segment_prefix|PSP]].
+  * this function cannot be called while in an [[back2root:ibm-pc-ms-dos:interrupts:int_28:start|INT 28]] handler in DOS 2.x unless the critical error flag is set or stack corruption will occur
+  * [[back2root:ibm-pc-ms-dos:interrupts:int_21:int_21_62|INT 21,62]] is highly recommended for DOS 3.x due to a possible bug when activated from a TSR. DOS may switch to the wrong internal stack which may cause a problems with TSR's if called during an INT 28.
+see [[back2root:ibm-pc-ms-dos:interrupts:int_21:int_21_62|INT 21,62]] (Get PSP segment) for DOS 3.x applications
+</WRAP>
+[[start|Back]]

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