VP

Section: Devices and Network Interfaces (4)
Updated: vax
Index Return to Main Contents

BSD mandoc
BSD 4  

NAME

vp - Versatec interface  

SYNOPSIS

device vp0 at uba0 csr 0177510 vector vpintr vpintr  

DESCRIPTION

The Versatec printer/plotter is normally used with the line printer system. This description is designed for those who wish to drive the Versatec directly.

To use the Versatec yourself, you must realize that you cannot open the device, /dev/vp0 if there is a daemon active. You can see if there is a daemon active by doing a lpq(1), and seeing if there are any files being sent. Printing should be turned off using lpc(8).

To set the Versatec into plot mode you should include Aq Pa sys/vcmd.h and use the ioctl(2) call

ioctl(fileno(vp), VSETSTATE, plotmd);

where plotmd is defined to be

int plotmd[] = { VPLOT, 0, 0 };

and vp is the result of a call to fopen on stdio. When you finish using the Versatec in plot mode you should eject paper by sending it a EOT after putting it back into print mode, i.e. by

int prtmd[] = { VPRINT, 0, 0 };
...
fflush(vp);
ioctl(fileno(vp), VSETSTATE, prtmd);
write(fileno(vp), "\04", 1);
 

FILES

/dev/vp0

 

DIAGNOSTICS

The following error numbers are significant at the time the device is opened.

Bq Er ENXIO
The device is already in use.
Bq Er EIO
The device is offline.

 

SEE ALSO

lpr(1), vtroff(1), va(4) font(5), lpd(8),  

HISTORY

A driver appeared in AT&T System v7 .  

BUGS

The configuration part of the driver assumes that the device is set up to vector print mode through 0174 and plot mode through 0200. As the configuration program can't be sure which vector interrupted at boot time, we specify that it has two interrupt vectors, and if an interrupt comes through 0200 it is reset to 0174. This is safe for devices with one or two vectors at these two addresses. Other configurations with 2 vectors may require changes in the driver.


 

Index

NAME
SYNOPSIS
DESCRIPTION
FILES
DIAGNOSTICS
SEE ALSO
HISTORY
BUGS

This document was created by man2html, using the manual pages.
Time: 06:48:32 GMT, May 19, 2025