pt.4 revision 17784 
1309466Sngie.Dd March 2, 1995
2272343Sngie.Dt PT 4
3272343Sngie.Os FreeBSD
4272343Sngie.Sh NAME
5272343Sngie.Nm pt
6272343Sngie.Nd SCSI processor type driver
7272343Sngie.Sh SYNOPSIS
8272343Sngie.Cd device pt0 at scbus?
9272343Sngie.Sh DESCRIPTION
10272343SngieThe
11272343Sngie.Nm
12272343Sngiedriver provides support for a 
13272343Sngie.Tn SCSI
14272343Sngieprocessor type device.  These are usually scanners and other
15272343Sngiedevices using the
16272343Sngie.Tn SCSI
17272343Sngielink as a communication interface with device
18272343Sngiespecific commands embedded in the data stream.
19272343Sngie.Pp
20272343SngieA
21272343Sngie.Tn SCSI
22272343Sngieadapter must be separately configured into the system
23272343Sngiebefore this driver can be used.
24272343Sngie.Pp
25272343SngieThis device only supports
26272343Sngie.Xr read 2
27272343Sngieand
28272343Sngie.Xr write 2 ,
29272343Sngieand the generic
30272343Sngie.Tn SCSI
31272343Sngie.Xr ioctl 2
32272343Sngiecalls.
33272343SngieThe
34272343Sngie.Sq Li at scbus?
35309466Sngieis required in the config file for the configuration
36272343Sngiesystem to know this is a SCSI device and generate the appropriate
37272343Sngietables.
38272343Sngie.Pp
39272343SngieThe
40272343Sngie.Sq Li 0
41272343Sngiein 
42272343Sngie.Sq Li pt0
43272343Sngiein the configuration is required.
44272343SngieThis is a deficiency in 
45272343Sngie.Xr config 8 .
46272343Sngie.Sh IOCTLS
47272343SngieThe 
48272343Sngie.Nm
49272343Sngiedriver has no
50272343Sngie.Fn ioctl
51272343Sngiecommands of its own but rather acts as a medium for the
52272343Sngiegeneric 
53272343Sngie.Xr scsi 4
54272343Sngiecommands. These are described in
55272343Sngie.Aq Pa sys/scsiio.h .
56272343SngieAll
57272343Sngie.Xr scsi 4
58272343Sngiedebug ioctls work on 
59272343Sngie.Nm
60272343Sngiedevices.
61272343Sngie.Sh FILES
62272343Sngie.Bl -tag -width /dev/ptQQQ -compact
63272343Sngie.It Pa /dev/pt Ns Ar N
64272343Sngiethe
65272343Sngie.No Ar N Ns th processor device.
66272343Sngie.El
67272343Sngie.Sh SEE ALSO
68272343Sngie.Xr scsi 4
69272343Sngie.Sh HISTORY
70272343SngieThe
71272343Sngie.Nm
72272343Sngiedriver appeared in 
73272343Sngie.Fx 2.1 .
74272343Sngie