How to obtain a valid .SIM source file

The SIM file is an output file from the Lattice pDS+ or ispDesignExpert software.

1. At the pDS software option, CHOICE OF OUTPUT FILE, select .SIM File.
2. The resultant .SIM file is formatted to run through FS-ATG.
   
   There are several versions of the Lattice pDS software from which you can generate .SIM files: pDS for Lattice, pDS for ViewLogic, and pDS+ for Abel.
   

• If using pDS+ for Abel, version 1.6 or higher is required.
• If using Lattice pDS software earlier than v2.0, then you must take an additional step to ensure that the .SIM file includes LOCK statements on all bi-directional pins. .SIM files created with older versions may be missing LOCK statements, and will not work properly with FS-ATG. To check for this condition, look in the .RPT file generated by the Lattice pDS software. Compare the LOCK statements in the .RPT file with corresponding pin statements in the .SIM file. If any LOCK statements in the .SIM are missing, you must enter these statements manually.