Category: no classification
INT 21 - DR DOS $IDLE$ - IOCTL - DYNAMIC IDLE DETECTION CONTROL AX = 4403h BX = file handle referencing character device $IDLE$ CX = number of bytes to write (0004h) DS:DX -> $IDLE$ IOCTL structure (see #04113) Return: CF clear if successful AX = number of bytes actually written CF set on error AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h) Notes: When the DR DOS IBMBIO.COM detects the presence of the $IDLE$ device during startup, it will retrieve the address of the idle state data area via INT 21/AX=4458h and pass it along to the $IDLE$ device driver by calling this function.