Here's a link to the Actel www site for their page on variables for Placement and Routing: Place and Route Variables
For archive purposes, here's a summary of the variables. If the link above breaks, please let me know at rich.katz@gsfc.nasa.gov. I don't like to use external links as they are hard to maintain.
LAYOUT_MODE determines the type of layout that will occur. Select
STANDARD for typical layout or select
TIMING_DRIVEN for Direct Time Layout.
PLAINC determines whether the current placement will be based on the
previous placement. Select 0 when you
desire the current placement to be based on the previous placement or select 1 when you
want the placement to
start fresh.
RESTRICTPROBEPINS determines whether the SDI, DCLK, PRA and PRB0 pins
will be used as I/Os. Select 0 to
prevent the usage of the special probe pins or select 1 to use the probe pins.
RESTRICTJTAGPINS determines whether the TDI, TDO, TMS and TCLK pins will
be used as I/Os. Select 0 to prevent
the usage of the special jtag pins or select 1 to use the jtag pins. Yes, it is an issue and I've put in a call about the TRST* pin.
PLACEOVERNIGHT determines the amount of time the placement algorithm will
run. Select 1 to do placement that
will run 5 to 6 times longer than normal or select 0 for normal run time.
PLACESEEDRANDOM causes the placement algorithm to start from a different
starting point. Every starting point
produces a slightly different result. Set this to a positive integer x, such that 1 < x
< 231 - 1.
LAYOUTINFO causes layout to record layout information in a file whose
name is the value of LAYOUTINFO.
LAYOUTAFL causes layout to output an afl information in a file whose name
is the value of LAYOUTAFL.
cob_ist_fc 1
LAYOUTINFO <filename>
ALSFC=TRUE
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Last Revised: January 09, 2002
Digital Engineering Institute
Web Grunt: Richard Katz