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30 .\" from: @(#)vp.4 8.1 (Berkeley) 6/5/93
37 .Nd Versatec printer/plotter interface
39 .Cd "vp0 at uba0 csr 0177510 vector vpintr vpintr"
41 NOTE: This driver has not been ported from
45 The Versatec printer/plotter is normally used with the
47 This description is designed for those who wish to drive the Versatec directly.
49 To use the Versatec yourself, you must realize that you cannot open the
52 if there is a daemon active.
53 You can see if there is a daemon active by doing a
55 and seeing if there are any files being sent.
56 Printing should be turned off using
59 To set the Versatec into plot mode you should include
64 .Bd -literal -offset indent
65 ioctl(fileno(vp), VSETSTATE, plotmd);
71 .Bd -literal -offset indent
72 int plotmd[] = { VPLOT, 0, 0 };
77 is the result of a call to
80 When you finish using the Versatec in plot mode you should eject paper
83 after putting it back into print mode, i.e. by
84 .Bd -literal -offset indent
85 int prtmd[] = { VPRINT, 0, 0 };
88 ioctl(fileno(vp), VSETSTATE, prtmd);
89 write(fileno(vp), "\e04", 1);
92 .Bl -tag -width /dev/vp0xx -compact
96 The following error numbers are significant at the
97 time the device is opened.
98 .Bl -tag -width [ENXIO]
100 The device is already in use.
102 The device is offline.
116 The configuration part of the driver assumes that the device is set up to
117 vector print mode through 0174 and plot mode through 0200.
118 As the configuration program can't be sure
119 which vector interrupted at boot time,
120 we specify that it has two interrupt vectors,
121 and if an interrupt comes through 0200 it is reset to 0174.
122 This is safe for devices with one or two vectors at these two addresses.
123 Other configurations with 2 vectors may require changes in the driver.