.\" Copyright (c) 1998, 1999, Nicolas Souchu
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.\" $FreeBSD: releng/12.2/share/man/man4/vpo.4 357620 2020-02-06 16:22:16Z imp $
.\"
.Dd December 21, 2019
.Dt VPO 4
.Os
.Sh NAME
.Nm vpo
.Nd parallel to SCSI interface driver
.Sh SYNOPSIS
.Cd "device vpo"
.Pp
For one or more SCSI busses:
.Cd "device scbus"
.Sh DESCRIPTION
The
.Nm
driver provide access to parallel port Iomega Zip and Jaz drives.
.Sh DEPRECATION NOTICE
The
.Nm
driver is not present in
.Fx 13.0
and later.
.Sh HARDWARE
The
.Nm
driver supports the following parallel to SCSI interfaces:
.Pp
.Bl -bullet -compact
.It
Adaptec AIC-7110 Parallel to SCSI interface (built-in to Iomega ZIP
drives)
.It
Iomega Jaz Traveller interface
.It
Iomega MatchMaker SCSI interface (built-in to Iomega ZIP+ drives)
.El
.Sh USAGE
The driver should let you use a printer connected to the drive while
transferring data.
.Pp
DOS and
.Fx
file systems are supported.
When mounting a DOS file system or
formatting a
.Fx
file system, check the slice of the disk with the
.Xr gpart 8
utility.
.Pp
In order to unixify a ZIP disk, put the following in /etc/disktab:
.Bd -literal
zip|zip 100:\\
        :ty=removable:se#512:nc#96:nt#64:ns#32:\\
        :pa#196608:oa#0:ba#4096:fa#512:\\
        :pb#196608:ob#0:bb#4096:fb#512:\\
        :pc#196608:oc#0:bc#4096:fc#512:
.Ed
.Pp
and use
.Xr bsdlabel 8 .
.Pp
If you have trouble with your driver, your parallel chipset may not run
properly at the detected mode (NIBBLE, PS2 or EPP).
Tune the
.Xr ppc 4
bootflags to force other modes.
.Sh SEE ALSO
.Xr da 4 ,
.Xr lpt 4 ,
.Xr ppbus 4 ,
.Xr ppc 4 ,
.Xr scsi 4
.Sh HISTORY
The
.Nm
manual page first appeared in
.Fx 3.0 .
.Sh AUTHORS
This
manual page was written by
.An Nicolas Souchu .
.Sh BUGS
During boot, the driver first tries to detect a classic ZIP, then a ZIP+.
The ZIP+ detection is intrusive and may send erroneous characters to your
printer if the drive is not connected to your parallel port.