Différences

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

--- back2root:ibm-pc-ms-dos:interrupts:int_21:int_21_50 [2023/01/10 11:55] – supprimée - modification externe (Unknown date) 127.0.0.1
+++ back2root:ibm-pc-ms-dos:interrupts:int_21:int_21_50 [2024/04/08 08:23] (Version actuelle) – ↷ Liens modifiés en raison d'un déplacement. 23.22.35.162
@@ Ligne 1: / Ligne 1: @@
+====== INT 0x21 - 0x50 - Set Current Process ID ======
+<WRAP round info >
+Undocumented DOS 2.x
+</WRAP>
+===== Request/Call: =====
+{{tablelayout?rowsHeaderSource=Auto&colwidth=""}}
+^  reg  ^  value  ^  descr  ^
+|  AH   |  0x50   |         |
+|  BX   |     | process ID number (process [[back2root:ibm-pc-ms-dos:hardware:informations:program_segment_prefix|PSP]] segment Address)  |
+===== Return: =====
+Nothing
+===== Notes & Comments =====
+<WRAP round box>
+  * the process ID number is actually the segment address of a program's PSP. This is useful for TSR's to access their own file handle table inside their PSP.
+  * this function cannot be called while in an INT 28 handler in DOS 2.x unless the critical error flag is set or stack corruption will occur
+  * safe in DOS 3.x [[back2root:ibm-pc-ms-dos:interrupts:int_28:start|INT 28]] handlers since they use a different stack by default
+  * available in OS/2 compatibility box
+ see  [[back2root:ibm-pc-ms-dos:interrupts:int_21:int_21_51|INT 21,51]], [[back2root:ibm-pc-ms-dos:interrupts:int_21:int_21_62|INT 21,62]]
+</WRAP>
+[[start|Back]]

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