Category: DOS extenders
Flags: available only in protected mode
INT 21 - Phar Lap 386/DOS-Extender - CONVERT PROTECTED-MODE ADDRESS TO MS-DOS AX = 250Fh ES:EBX = 48-bit protected-mode address to convert ECX = 00000000h or length of data in bytes Return: CF clear if successful (address < 1MB and contiguous) ECX = 32-bit real-mode MS-DOS address CF set on error (address >= 1MB or not contiguous) ECX = linear address Note: this function is also supported by FlashTek X-32VM SeeAlso: AX=2510h