h6. [[OS SWI Calls]] h6(. » [[OS_Byte]] h6((. » [[OS_Byte 3]] h6(((. » Output Stream Status |_<^{width:3em}. Bit |_<^. Stream affected | |<^. 0|<^. Enables serial driver| |<^. 1|<^. Disables VDU drivers | |<^. 2|<^. Disables VDU printer stream | |<^. 3|<^. Enables printer (regardless of VDU state) | |<^. 4|<^. Disables spooled output | |<^. 5|<^. Calls [[VDUXV|VDUXV]] (VDU extension vector) instead of VDU drivers | |<^. 6|<^. Disables printer, except for [[VDU 1|VDU 1,n]] | |<^. 7|<^. Not used | h4. Notes Bit 1 is not the same as [[VDU 21]]; with VDU 21 bytes are still sent to the printer if it has been enables with [[VDU 2]]. Bit 3 is not the same as [[VDU 2]]; when set (and bits 2 and 6 clear!) *all* bytes except the printer ignore character (see [[OS_Byte 6]]) are sent to the printer stream. h4. See also * [[VDU 1]] * [[VDU 2]] * [[VDU 21]] * [[VDUXV]] * [[OS_Byte]] * [[OS_Byte 3]] * [[OS_Byte 6]]