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28 <h1><a name="converts_vcd_files_to_vzt_files_vcd2vzt" id="converts_vcd_files_to_vzt_files_vcd2vzt">Converts VCD files to VZT files (vcd2vzt)</a></h1>
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30 <pre class="code">VCD2VZT(1) Filetype Conversion VCD2VZT(1)
34 NAME
35 vcd2vzt - Converts VCD files to VZT files
37 SYNTAX
38 vcd2vzt [option]... [VCDFILE] [VZTFILE]
40 DESCRIPTION
41 Converts VCD files to VZT files.
43 OPTIONS
44 -v,--vcdname &lt;filename&gt;
45 Specify VCD input filename.
47 -l,--vztname &lt;filename&gt;
48 Specify VZT output filename.
50 -d,--depth &lt;value&gt;
51 Specify 0..9 gzip compression depth, default is 4.
53 -m,--maxgranule &lt;value&gt;
54 Specify number of granules per section, default is 8. One gran-
55 ule is equal to 32 timesteps.
57 -b,--break &lt;value&gt;
58 Specify break size (default = 0 = off). When the break size is
59 exceeded, the VZT dumper will dump all state information at the
60 next convenient granule plus dictionary boundary.
62 -z,--ziptype &lt;value&gt;
63 Specify zip type (default = 0 gzip, 1 = bzip2). This allows you
64 to override the default compression algorithm to use a more
65 effective one at the expense of greater runtime. Note that
66 bzip2 does not decompress as fast as gzip so the viewer will be
67 about two times slower when decompressing blocks.
69 -t,--twostate
70 Forces MVL2 twostate mode (default is MVL4). When enabled, the
71 trace will only store 0/1 values for binary facilities. This is
72 useful for functional simulation and will speed up dumping as
73 well as make traces somewhat smaller.
75 -r, --rle
76 Uses an bitwise RLE compression on the value table. Default is
77 off. When enabled, this causes the trace data table to be
78 stored using an alternate representation which can improve com-
79 pression in many cases.
81 -h,--help
82 Show help screen.
86 EXAMPLES
88 Note that you should specify dumpfile.vcd directly or use &quot;-&quot; for
89 stdin.
91 vcd2vzt dumpfile.vcd dumpfile.lxt --depth 9 --break 1073741824
92 This sets the compression level to 9 and sets the break size to
93 1GB.
95 vcd2vzt dumpfile.vcd dumpfile.lxt --depth 9 --maxgranule 512
96 Allows more granules per section which allows for greater com-
97 pression at the expense of memory usage.
99 LIMITATIONS
100 vcd2vzt does not store glitches as these are coalesced together into
101 one value change during the writing of the VZT file.
104 AUTHORS
105 Anthony Bybell &lt;bybell@nc.rr.com&gt;
107 SEE ALSO
108 vzt2vcd(1) lxt2vcd(1) vcd2lxt2(1) gtkwave(1)
112 Anthony Bybell 1.3.48 VCD2VZT(1)</pre>
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