INT 2F U - DOS 4.0+ ANSI.SYS internal - MISCELLANEOUS REQUESTS AX = 1A02h DS:DX -> parameter block (see #02735) Return: CF clear if successful CF set on error AX = error code Note: DOS 5+ chains to previous handler if AL > 02h on call SeeAlso: AX=1A01h Format of ANSI.SYS parameter block: Offset Size Description (Table 02735) 00h BYTE subfunction 00h set/reset interlock 01h get /L flag 01h BYTE interlock state 00h=reset, 01h=set This interlock prevents some of the ANSI.SYS post-processing in its hook onto INT 10, AH=00h mode set 02h BYTE (returned) 00h if /L not in effect 01h if /L in effect