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DV2DT(1)		    General Commands Manual		      DV2DT(1)

NAME
       dv2dt - convert a binary	TeX DVI	file to	DTL text representation

SYNOPSIS
       dv2dt input-DVI-file output-DTL-file

       If the filenames	are omitted, then stdin	and stdout are assumed.

DESCRIPTION
       dv2dt  converts	a  binary TeX DVI file to an editable text file	in DTL
       (DVI Text Language) format.  The	companion dt2dv(1) utility can convert
       the DTL file back to a binary DVI file.

DVI COMMAND DESCRIPTION
       TeX DVI files contain a compact binary description of typeset pages, as
       a stream	of operation code bytes, each immediately followed by zero  or
       more  parameter	bytes.	 The format of DVI files is fully described in
       Donald  E.  Knuth,  TeX:	 The  Program,	Addison-Wesley	(1986),	  ISBN
       0-201-13437-3,  as  well	 as  in	the dvitype(1) literate	program	source
       code.

       For convenience,	we provide a summary of	DVI  commands  here.   In  the
       following list, operation code bytes are	given as unsigned decimal val-
       ues, followed by	their symbolic names (not present in  the  DVI	file),
       and a short description.	 A designation like b[+n] means	that the oper-
       ation code byte is followed by a	parameter b which uses n bytes,	and is
       signed.	 Without the plus sign,	the parameter is unsigned.  Signed in-
       teger parameter values  are  always  represented	 in  two's  complement
       arithmetic, which is the	system followed	by most	computers manufactured
       today, including	all personal computers and workstations.

       0 set_char_0	Set character 0	from current font.

       ...

       127 set_char_127	Set character 127 from current font.

       128 set1	 c[1]	Set 1-byte unsigned character (uchar) number c.

       129 set2	 c[2]	Set 2-byte uchar number	c.

       130 set3	 c[3]	Set 3-byte uchar number	c.

       131 set4	 c[+4]	Set 4-byte signed character (schar) number c.

       132 set_rule  a[+4]  b[+4]
			Set rule, height a, width b.

       133 put1	 c[1]	Put 1-byte uchar c.

       134 put2	 c[2]	Put 2-byte uchar c.

       135 put3	 c[3]	Put 3-byte uchar c.

       136 put4	 c[+4]	Put 4-byte schar c.

       137 put_rule  a[+4]  b[+4]
			Put rule, height a, width b.

       138 nop		Do nothing.

       139 bop	c0[+4]	...  c9[+4]  p[+4]
			Beginning of page.  The	parameters c0  ...  c9 are the
			TeX page counters, the contents	of TeX count registers
			\count0	 ...  \count9.	The parameter p	 is  the  byte
			offset	from the beginning of the DVI file of the pre-
			vious bop operation code byte.	The first such command
			in the file has	p = -1.

       140 eop		End of page.

       141 push		Push (h,v,w,x,y,z) onto	stack.

       142 pop		Pop (h,v,w,x,y,z) from stack.

       143 right1  b[+1]
			Move right b units.

       144 right2  b[+2]
			Move right b units.

       145 right3  b[+3]
			Move right b units.

       146 right4  b[+4]
			Move right b units.

       147 w0		Move right w units.

       148 w1  b[+1]	Move right b units, and	set w =	b.

       149 w2  b[+2]	Move right b units, and	set w =	b.

       150 w3  b[+3]	Move right b units, and	set w =	b.

       151 w4  b[+4]	Move right b units, and	set w =	b.

       152 x0		Move right x units.

       153 x1  b[+1]	Move right b units, and	set x =	b.

       154 x2  b[+2]	Move right b units, and	set x =	b.

       155 x3  b[+3]	Move right b units, and	set x =	b.

       156 x4  b[+4]	Move right b units, and	set x =	b.

       157 down1  a[+1]	Move down a units.

       158 down2  a[+2]	Move down a units.

       159 down3  a[+3]	Move down a units.

       160 down4  a[+4]	Move down a units.

       161 y0		Move right y units.

       162 y1  a[+1]	Move right a units, and	set y =	a.

       163 y2  a[+2]	Move right a units, and	set y =	a.

       164 y3  a[+3]	Move right a units, and	set y =	a.

       165 y4  a[+4]	Move right a units, and	set y =	a.

       166 z0		Move right z units.

       167 z1  a[+1]	Move right a units, and	set z =	a.

       168 z2  a[+2]	Move right a units, and	set z =	a.

       169 z3  a[+3]	Move right a units, and	set z =	a.

       170 z4  a[+4]	Move right a units, and	set z =	a.

       171 fnt_num_0	Set current font number	(f) = 0.

       ...

       234 fnt_num_63	Set f =	63.

       235 fnt1	 k[1]	Set f =	k.

       236 fnt2	 k[2]	Set f =	k.

       237 fnt3	 k[3]	Set f =	k.

       238 fnt4	 k[+4]	Set f =	k.

       239 xxx1	 k[1]  x[k]
			Special	string x with k	bytes.

       240 xxx2	 k[2]  x[k]
			Special	string x with k	bytes.

       241 xxx3	 k[3]  x[k]
			Special	string x with k	bytes.

       242 xxx4	 k[4]  x[k]
			Special	string x with (unsigned) k bytes.

       243 fnt_def1  k[1] c[4] s[4] d[4] a[1] l[1] n[a+l]
			Define font k.	The parameters are:

			c   Checksum for TFM file.

			s   Scale factor, in DVI units.

			d   Design size, in DVI	units.

			a   Length of the ``area'' or directory.

			l   Length of the font name.

			n   Area and font name string(s).

       244 fnt_def2  k[2] c[4] s[4] d[4] a[1] l[1] n[a+l]
			Define font k.

       245 fnt_def3  k[3] c[4] s[4] d[4] a[1] l[1] n[a+l]
			Define font k.

       246 fnt_def4  k[+4] c[4]	s[4] d[4] a[1] l[1] n[a+l]
			Define font k.

       247 pre	i[1]  num[4]  den[4]  mag[4]  k[1]  x[k]
			Begin preamble.	 The parameters	are:

			i     DVI  format.   Standard TeX has ID = 2, and TeX-
			      XeT has ID = 3.

			num   Numerator	of 100 nm / DVI	unit.

			den   Denominator of 100 nm / DVI unit.

			mag   1000 * magnification.

			k     Comment length.

			x     Comment string.

       248 post	 p[4] num[4] den[4] mag[4] l[4]	u[4] s[2] t[2]
			Begin postamble.  The parameters are:

			p     Pointer to final bop.

			num, den, mag
			      Duplicates of values in preamble.

			l     Height-plus-depth	of tallest page, in DVI	units.

			u     Width of widest page, in DVI units.

			s     Maximum stack depth needed to process  this  DVI
			      file.

			t     Total number of pages (bop commands) present.

       249 post_post  q[4] i[1]	223 ...	223
			End postamble.	The parameters are:

			q     Byte  offset  from the beginning of the DVI file
			      to the post command that started the postamble.

			i     DVI format ID, as	in the preamble.

			223   At least four 223	bytes.

       250		Undefined.

       ...

       255		Undefined.

DTL COMMAND DESCRIPTION
       A DTL file contains one line per	command, with a	limit of 1024  charac-
       ters  per  line.	 Each command contains a symbolic operation name, fol-
       lowed by	zero or	more parameter values.	The parameter  value  descrip-
       tions are not repeated here; they can be	found in the previous section.

       variety <variety-name>
			    This  command  specifies  the name of the DTL file
			    type; it has no DVI	file equivalent.

       (text)		    Series of set_char commands, for  printable	 ASCII
			    text.

       \(		    Literal ASCII left parenthesis in (text).

       \)		    Literal ASCII right	parenthesis in (text).

       \\		    Literal ASCII backslash in (text).

       \"		    Literal ASCII double quote in (text).

       \XY		    Set_char  for  character with hexadecimal code XY,
			    not	in parentheses,	but by itself for readability.

       s1, s2, s2, s3	    Set, with (1,2,3,4)-byte charcodes.

       sr		    set_rule.

       p1, p2, p2, p3	    Put, with (1,2,3,4)-byte charcodes.

       pr		    put_rule.

       nop		    nop	(do nothing).

       bop		    bop	(beginning of page).

       eop		    eop	(end of	page).

       [		    Push.

       ]		    Pop.

       r1, r2, r3, r4	    Right, with	(1,2,3,4)-byte argument.

       w0, w1, w2, w3, w4   As in DVI.

       x0, x1, x2, x3, x4   As in DVI.

       d1, d2, d3, d4	    Down, with (1,2,3,4)-byte argument.

       y0, y1, y2, y3, y4   As in DVI.

       z0, z1, z2, z3, z4   As in DVI.

       fn		    fnt_num (set current font to font number in	 0  to
			    63).

       f1, f2, f3, f4	    fnt	 (set current font to (1,2,3,4)-byte font num-
			    ber).

       special		    xxx	(special commands with	(1,2,3,4)-byte	string
			    length).

       fd		    fnt_def (assign a number to	a named	font).

       pre		    Preamble.

       post		    post (begin	postamble).

       post_post	    post_post (end postamble).

       opcode		    Undefined DVI command (250 to 255).

SAMPLE DTL FILE
       The following 2-line TeX	file
	      Hello.
	      \bye
       when processed with the commands
	      tex hello.tex
	      dv2dt hello.dvi hello.dtl
       produces	this DTL file:
	      variety sequences-6
	      pre 2 25400000 473628672 1000 27 ' TeX output 1995.03.02:2334'
	      bop 1 0 0	0 0 0 0	0 0 0 -1
	      [
	      d3 -917504
	      ]
	      d4 42152922
	      [
	      d4 -41497562
	      [
	      r3 1310720
	      fd1 0 11374260171	655360 655360 0	5 '' 'cmr10'
	      fn0
	      (Hello.)
	      ]
	      ]
	      d3 1572864
	      [
	      r4 15229091
	      (1)
	      ]
	      eop
	      post 42 25400000 473628672 1000 43725786 30785863	2 1
	      fd1 0 11374260171	655360 655360 0	5 'cmr10'
	      post_post	152 2 223 223 223 223
       The command
	      dt2dv hello.dtl hello.dvi
       will reconstruct	the original DVI file.

SEE ALSO
       dt2dv(1), dvitype(1), tex(1).

FILES
       *.dvi   binary TeX DVI file.

       *.dtl   text representation of a	TeX DVI	file in	DVI Text Language for-
	       mat.

AUTHOR
       dv2dt and dt2dv(1) were written by
	      Geoffrey Tobin
	      Department of Electronic Engineering
	      La Trobe University
	      Bundoora,	Victoria 3083
	      Australia
	      Tel: +61 3 479 3736
	      FAX: +61 3 479 3025
	      Email: <G.Tobin@ee.latrobe.edu.au>

       These manual pages were primarily written by
	      Nelson H.	F. Beebe, Ph.D.
	      Center for Scientific Computing
	      Department of Mathematics
	      University of Utah
	      Salt Lake	City, UT 84112
	      Tel: +1 801 581 5254
	      FAX: +1 801 581 4148
	      Email: <beebe@math.utah.edu>

Version	0.6.0			 08 March 1995			      DV2DT(1)

NAME | SYNOPSIS | DESCRIPTION | DVI COMMAND DESCRIPTION | DTL COMMAND DESCRIPTION | SAMPLE DTL FILE | SEE ALSO | FILES | AUTHOR

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