| lpt.4 (79538) | lpt.4 (79727) |
|---|---|
| 1.\" 2.\" Copyright (c) 1993 Christopher G. Demetriou 3.\" Copyright (c) 1994 Geoffrey M. Rehmet 4.\" Copyright (c) 1999 Nicolas Souchu 5.\" All rights reserved. 6.\" 7.\" Redistribution and use in source and binary forms, with or without 8.\" modification, are permitted provided that the following conditions --- 11 unchanged lines hidden (view full) --- 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" | 1.\" 2.\" Copyright (c) 1993 Christopher G. Demetriou 3.\" Copyright (c) 1994 Geoffrey M. Rehmet 4.\" Copyright (c) 1999 Nicolas Souchu 5.\" All rights reserved. 6.\" 7.\" Redistribution and use in source and binary forms, with or without 8.\" modification, are permitted provided that the following conditions --- 11 unchanged lines hidden (view full) --- 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" |
| 28.\" $FreeBSD: head/share/man/man4/lpt.4 79538 2001-07-10 15:31:11Z ru $ | 28.\" $FreeBSD: head/share/man/man4/lpt.4 79727 2001-07-14 19:41:16Z schweikh $ |
| 29.\" 30.Dd February 14, 1999 31.Dt LPT 4 32.Os 33.Sh NAME 34.Nm lpt 35.Nd generic printer device driver 36.Sh SYNOPSIS --- 28 unchanged lines hidden (view full) --- 65See 66.Xr ppbus 4 67for more info about the ppbus system. 68.Pp 69The parallel port bus is allocated by lpt when the printer device is opened 70and released only when the transfer is completed: either when the device 71is closed or when the entire buffer is sent in interrupt driven mode. 72.Pp | 29.\" 30.Dd February 14, 1999 31.Dt LPT 4 32.Os 33.Sh NAME 34.Nm lpt 35.Nd generic printer device driver 36.Sh SYNOPSIS --- 28 unchanged lines hidden (view full) --- 65See 66.Xr ppbus 4 67for more info about the ppbus system. 68.Pp 69The parallel port bus is allocated by lpt when the printer device is opened 70and released only when the transfer is completed: either when the device 71is closed or when the entire buffer is sent in interrupt driven mode. 72.Pp |
| 73The driver can be configured to be either interrupt-driven, or 74to poll the printer. Ports that are configured to be | 73The driver can be configured to be either interrupt-driven, or 74to poll the printer. Ports that are configured to be |
| 75interrupt-driven can be switched to polled mode by using the 76.Xr lptcontrol 8 77command. 78.Pp 79Depending on your hardware, extended capabilities may be configured with the 80.Xr lptcontrol 8 81command. 82With an ECP/ISA port, you can take advantage --- 14 unchanged lines hidden (view full) --- 97.Bl -tag -width Pa -compact 98.It Pa /dev/lpt0 99first parallel port driver 100.El 101.Sh BUGS 102There are lots of them, especially in cheap parallel port implementations. 103.Pp 104It is only possible to open a lpt port when a printer is connected and | 75interrupt-driven can be switched to polled mode by using the 76.Xr lptcontrol 8 77command. 78.Pp 79Depending on your hardware, extended capabilities may be configured with the 80.Xr lptcontrol 8 81command. 82With an ECP/ISA port, you can take advantage --- 14 unchanged lines hidden (view full) --- 97.Bl -tag -width Pa -compact 98.It Pa /dev/lpt0 99first parallel port driver 100.El 101.Sh BUGS 102There are lots of them, especially in cheap parallel port implementations. 103.Pp 104It is only possible to open a lpt port when a printer is connected and |
| 105on-line, making it impossible to run 106.Xr lptcontrol 8 | 105on-line, making it impossible to run 106.Xr lptcontrol 8 |
| 107when there is no printer connected. 108.Pp 109This driver could still stand a rewrite. | 107when there is no printer connected. 108.Pp 109This driver could still stand a rewrite. |