only at the time of running the command "load". But cells are generally
loaded only on an as-needed basis, so the dereferencing option must be
saved as a flag in the cell and honored whenever its subcells are expanded
or otherwise read at a later time.
limit of the Calma definition, and probably has not done so for ages.
Nobody informed me of this. The restriction has been lifted from
GDS input and output in Magic. It can be reinstated if necessary by
setting a flag in the cifoutput section of the techfile, but it is
likely that this will not be necessary unless there are other tools
that enforce the limit and will not read a GDS file that exceeds it.
a long-standing error (introduced with the "extresist geometry"
option) that can cause nets not to be extracted (due to the first
record not having extraction data, which was itself a long-standing
error in the code but which was not fixed correctly); (2) handle
"device mosfet" type transistors (previously only handled the old
"fet" type extraction devices); and (3) correct for the res.ext
file having a different scalefactor relative to the .ext file. The
latter item was solved by forcing all input to scale like
ExtCurStyle->exts_unitsPerLambda, locally correcting all input as
needed. Note that extresist still needs to handle other extraction
devices (e.g., resistors and capacitors) but those will require
additional handling in the routines which analyze the current path
to determine how to break up wires into paths.
which takes the existing generated CIF plane, finds all enclosed
areas that have an area less than <area>, and fills them in. This
satisfies a minimum hole area rule in a way that is not possible
with any of the existing CIF operators.
which adds an offset value of "start" to both X and Y from the
lower left corner of the fill area. This allows the use of the
"offset" (from the previous git commit) to be declared on different
layers without creating an exact overlap, as is often required by
foundries for fill patterns.
from a selection, which can then be used to index into other lists.
This lets one selection be made on a list of arbitrary names, and
then additional parameters can be linked together with the same
index). Also, implemented (finally!) the "offset" parameters of
the "slots" function (as advertised in the documentation).
like resistors where a tile other than space may border the resistor
device on its non-terminal sides (which is handled correctly, and
should not be considered an error).
rid of redundant port entries in subcircuits. There is still an outstanding
issue as to whether nodes and connections need to be recursively iterated
to the hierarchy bottom. The current fix corrected the test case. Also,
added a "-dereference" option to the "load" command to revert to the
original behavior of using only search paths from "addpath" when searching
for files to load.
used with "ext2spice hierarchy on" because the device index is not
reset between calls to output cells in the hierarchy, leading to
a mismatch of the index for all cells after the first one output.
simple FET device in extresist. Also: Extended the bloat-all CIF operator
again, allowing the trigger layer for the bloat operation to include both
CIF layers and magic layers (previously only magic layers were supported).
This extension is possible due to the previous extension allowing the
trigger layer and bloating layers to be on separate planes. This operator
extension is useful for tagging geometry that is in the proximity of, but
not overlapping, geometry on another plane.
reduction of memory and startup time, which was to maintain only
one CIF style in memory. The new method is just to read in and
keep the DRC CIF style separately from the output CIF style.
Because the CIF sections of the techfile are read before the DRC
sections, and the CIF DRC style is declared in the DRC section,
the CIF DRC style is read in on the fly during the first DRC
checking.
option "labels ... cellid" to handle some vendor files where
apparently to get around the 30-character cell name limit, the
actual cellname is encoded on a text layer. Added new cifop
"boundary" (no arguments) for cases where a cell abutment box
is encoded on a GDS layer; this now translates the bounding
box to the FIXED_BBOX property, as is done with the LEF bounding
box. Also corrected the property set function to free existing
property value allocated memory when overwriting a property with
a new value.
if a GDS (CIF) layer is dependent on, and only on, a templayer or
layers that get hierarchically processed, it will not get added to
the list of layers needing hierarchical processing, and therefore
end up not being generated in the output.
options "text", "port", and "noport" in the techfile. The
incorrect interpretation was preventing backwards compatibility,
such that ports would not be output on GDS layers if the "port"
option was not used.
window to change after hiding a layer using the toolbar and then
refreshing the layout. Fixed by saving and restoring the graphics
state around the routine that configures the toolbar image. Also
added a check to CifPaintCurrent to guard against using an unassigned
ClientData record as a pointer (causes a crash), and added braces
around "expr" values in the Tcl wrapper, which reportedly results in
faster execution of the expression.
"port" and "noport" in the cifoutput section to distinguish
between layer:purpose pairs for port text vs. other kinds of
text. This allows a closer correspondence between GDS read and
write. Note that the port writing is currently only in the GDS
write routine, not in the CIF routine.
This allows text appearing on a specific GDS layer:purpose pair
to be interpreted as a port. This does not quite match the
intended behavior of such layers, since it is implied that any
layer geometry coincident with the text should form the area of
the port, which is not (yet) handled. Also, it is presumably
implied that the port order matches the order in which text
appears in the GDS stream, but magic does not preserve this
order when re-writing any GDS output.
magic conversion for making magic contact types from contact cuts
from the CIF/GDS input rules rather than the output rules. This
generally makes more sense, plus avoids conflicts where the output
rules may be set for CIF-DRC checks and may not be appropriate for
LEF input without changing the style.
enabling the "plow" command. At this time, however, not all
rules are being implemented correctly given the numerous changes
to the DRC handling since the last time "plow" was working. Fixes
are ongoing.
handling for grid subdivision. Scaled the value of "center"
for a CIF box and then attempted to use "center" as an unscaled
value. Same correction as made to magic-8.1.
development had been halted since it was first created back in April.
Version 8.2 is now the official development version, with the first
development push to create a Cairo graphics interface.
Tim Edwards