Category: DOS extenders
Flags: available only in protected mode
INT 21 - Phar Lap 386/DOS-Extender - ISSUE REAL-MODE INTERRUPT AX = 2511h DS:EDX -> parameter block (see #01361) Return: all segment registers unchanged EDX unchanged all other registers contain values set by the real-mode int handler the flags are set as they were left by the real-mode interrupt handler real-mode register values are returned in the parameter block Note: this function is also supported by FlashTek X-32VM SeeAlso: AX=2503h,AX=2505h,AX=250Eh,AH=E3h"OS/286",INT 31/AX=0300h