Différences

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

--- back2root:ibm-pc-ms-dos:interrupts:int_21_34 [2023/01/08 11:45] – créée frater
+++ back2root:ibm-pc-ms-dos:interrupts:int_21:int_21_34 [2023/01/10 15:38] – modification externe 127.0.0.1
@@ Ligne 22: / Ligne 22: @@
 <WRAP round box>
   * AKA the INDOS flag, this critical section flag may be checked from within an interrupt handler before requesting a DOS service. It is a semaphore that is non-zero when DOS is busy, and zero otherwise.
-  * though this flag indicates whether a DOS interrupt is active, it should not be used alone to determine DOS is safe for re-entry; Here's the standard rule for safe DOS entry: if INT 28 is active or this flag and the critical error flag are clear then it is safe to call DOS
+  * though this flag indicates whether a DOS interrupt is active, it should not be used alone to determine DOS is safe for re-entry; Here's the standard rule for safe DOS entry: if [[back2root:ibm-pc-ms-dos:interrupts:int_28|INT 28]] is active or this flag and the critical error flag are clear then it is safe to call DOS
   * this interrupt should be used only during TSR initialization; the returned pointer should be used thereafter
-  * this flag is cleared after a critical error (INT 24)
+  * this flag is cleared after a critical error ([[back2root:ibm-pc-ms-dos:interrupts:int_24|INT 24]])
     * ES:BX-1 points to the critical error flag for DOS 3.x+
     * ES:BX+1 points to the critical error flag for DOS 2.x
     * ES:BX-1AA points to the critical error flag for COMPAQ DOS 3.0
-INT 21,5D in DOS 3.x+ can be used to locate the critical error flag</WRAP>
+INT [[back2root:ibm-pc-ms-dos:interrupts:int_21_5d|21,5D]] in DOS 3.x+ can be used to locate the critical error flag</WRAP>
+[[start|Back]]