.TH VP 4 .SH NAMEvp \- Versatec printer-plotter.SH DESCRIPTION.I Vp0is the interface to a Versatec D1200A printer-plotterwith a Versatec C-PDP11(DMA) controller.Ordinarily bytes written on it are interpreted as ASCII charactersand printed.As a printer, it writes 64 lines of 132 characters each on11 by 8.5 inch paper.Only some of the ASCII control characters are interpreted..TPNLperforms the usual new-line function, i.e.spaces up the paper and resets to the left margin.It is ignored however following a CR which ends a non-empty line..TPCRis ignored if the current line is empty but is otherwiselike NL..TPFFresets to the left margin and then to the top of the next page..TPEOTresets to the left margin, advances 8 inches, and then performs a FF..PPThe.IR  ioctl (2)system call may be used to change the mode of the device.Only the first word of the 3-word argument structure is used.The bits mean:.TP0400Enter simultaneous print/plot mode..br.ns.TP0200Enter plot mode..br.ns.TP0100Enter print mode (default on open)..br.ns.TP040Send remote terminate..br.ns.TP020Send remote form-feed..br.ns.TP010Send remote EOT..br.ns.TP04Send remote clear..br.ns.TP02Send remote reset..PPOn open a reset, clear, and form-feed are performed automatically.Notice that the mode bits are not encoded, so that it is requiredthat exactly one be set..PPIn plot mode each byte is interpreted as 8 bitsof which the high-order is plotted to the left;a `1' leaves a visible dot.A full line of dots is produced by 264 bytes;lines are terminated only by count or by a remote terminate function.There are 200 dots per inch both vertically and horizontally..PPWhen simultaneous print-plot mode is enteredexactly one line of characters, terminated by NL, CR, orthe remote terminate function,should be written.Then the device enters plot mode andat least 20 lines of plotting bytes should be sent.As the line of characters (which is 20 dots high)is printed, the plotting bytes overlay the characters.Notice that it is impossible to print characters on baselinesthat differ by fewer than 20 dot-lines..PPIn print mode lines may be terminated either withan appropriate ASCII character or by using the remoteterminate function..SH FILES/dev/vp0.SH "SEE ALSO"opr(1)