Int 21 Fn FFBC - Topware Network OS V5.10+ - Cancel Topshow Function [N] AX = FFBCh CH = printer number (00h LPT1, 01h LPT2, 02h LPT3) CL = printer server station address or 00h for local printer Return: AL = status (00h successful, else failed) See Also: AX=FFBBh