Below are general variables relating to data input/output and format
translation.
-
- ChdFailOnUnresolved
Value: boolean.
If this variable is set, when doing an operation with a Cell Hierarchy
Digest (CHD) that was created from a file containing unresolved
references (cells that were referenced but not defined in the file),
and the cells can't be referenced through libraries, the operation
will fail. If not set, processing will continue, with the
non-references either being ignored (e.g., when flattening), or
converted to empty cells (when reading into the database), or
propagated to output (when writing output), depending on the
operation.
- ChdCmpThreshold
Value: integer >= 0.
When using a Cell Hierarchy Digest (CHD), by default instance lists
larger than 256 bytes are stored in compressed form in memory. This
reduces memory use, but there is a small speed penalty.
This variable sets the size threshold for compression. If set to a
value less than 100, no compression is done. Otherwise, instance
lists larger than the set size (in bytes) will be compressed.
Experimentation suggests that the largest blocks dominate the
decompression overhead, so that the value of this variable has little
effect, except when turning off compression entirely.
- MultiMapOk
Value: boolean.
When set, multiple input/output GDSII layer/datatype mapping to Xic
layers is enabled (as was always the case in Xic releases prior to
2.5.67-5). This allows objects in GDSII/OASIS files to be created on
more than one Xic layer, and objects on Xic layers to be
instantiated more than once in GDSII/OASIS output files (each with a
different layer/datatype). When not set, each object is created or
written once only, using the first mapping in the internal list that
applies (first matching layer or StreamOut keyword found).
- NoPopUpLog
Value: boolean.
When set, the File Browser loaded with the log file which
appears if there were errors or warnings when reading an input file or
writing output will not appear. This applies to the Open
command and equivalent, and the file input/output operations in the
Convert Menu. It is not recommended to set this in general, but
the browser popping up does become annoying at times, so this variable
can be set when the user knows what to expect in the file.
- UnknownGdsLayerBase
Value: integer 0-65535.
When translating to GDSII or OASIS from a file format that does not
have layer/datatype numbers, and no mapping can be resolved, new
layer/datatype combinations are created. The new layer numbers are
generated sequentially, starting with the value of UnknownGdsLayerBase, or 128 if this variable is not set. Each is
given the datatype UnknownGdsDatatype.
- UnknownGdsDatatype
Value: integer 0-65535.
This is the datatype assigned to new layers generated using the
UnknownGdsLayerBase. if not set, a datatype 128 is used.
- NoStrictCellnames
Value: boolean.
If the boolean variable NoStrictCellnames is set, there will be
no checking of cell names for white space, and the legacy behavior (in
releases prior to 3.0.5) of accepting white space in cell names will
be enabled. Otherwise, white space is not allowed in cell names, and
if such cells are found in an archive being read, aliasing will be
employed to map white space characters to underscores.
- NoFlattenStdVias
Value: boolean.
When set, and when flattening a physical cell hierarchy, standard via
instances will be retained as such rather than being converted to
geometry. This variable tracks the state of the Don't flatten
standard vias, move to top check box in the Flatten Hierarchy
panel, and the Don't flatten standard vias, keep as instances at
top level check boxes in the Setup pages of the Import
Control panel, Export Control panel, and the Format
Conversion panel.
Presently, when the input data source is an archive file, this
variable applies only when sub-masters are not contained in the
source file, and are therefor created in Xic.
- NoFlattenPCells
Value: boolean.
When set, and when flattening a physical cell hierarchy, parameterized
cell (pcell) instances will be retained as such rather than being
converted to geometry. This variable tracks the state of the Don't flatten param. cells, move to top check box in the Flatten Hierarchy panel, and the Don't flatten pcells, keep as
instances at top level check boxes in the Setup pages of the
Import Control panel, Export Control panel, and the Format Conversion panel.
Presently, when the input data source is an archive file, this
variable applies only when sub-masters are <b>not</b> contained in the
source file, and are therefor created in Xic.
- NoFlattenLabels
Value: boolean.
When set, and when flattening a cell hierarchy (physical or
electrical), labels found in subcells are ignored (not copied into the
current cell). Labels found in the current cell are retained. This
is intended to avoid creating conflicting net labels of wire nets from
(subnet) labels in subcells. This variable tracks the state of the
Ignore labels in subcells check box in the Flatten
Hierarchy panel, and the Ignore labels in subcells check boxes
in the Setup pages of the Import Control panel, Export Control panel, and the Format Conversion panel.
- NoReadLabels
Value: boolean.
When this variable is set, text label elements will not be read from
archive files in physical mode. This may improve efficiency if the
user is concerned with physical layout data only. This variable
tracks the setting of the Skip reading text labels from physical
archives check box in the Setup page of the Import
Control panel from the Convert Menu.
- KeepBadArchive
Value: boolean.
When generating an archive file and an error occurs, the archive file
will normally be deleted. However, if this variable is set, the
output file will be given a ``.BAD'' extension and retained.
This file should be considered corrupt, but may be useful for
diagnostics.
