# Finishing Up

### Save and Exit

Choose Save from the File menu to save the project file. This will allow you to reopen the project later, with all settings restored. Choose Exit from the File menu to exit the program. A dialog will ask you to confirm that you wish to quit. You can also exit by closing the SpiTran main window using window manager controls.

### Project Directory Files

This is what the project directory might look like after completing a buffer translation:
Most of the files are created by s2ibis2. Here is a summary of the files in the iobuff example project, organized by file extension:

- iobuff.spp is the project data file. This is created and read by SpiTran.
- iobuff.s2i is the s2ibis2 control file prepared by SpiTran.
- .sp files are SPICE files. One of them is the SPICE buffer you imported into the project. Some of them are part of the top level circuit created by SpiTran.

- iobuff.sp is the file imported into the project.
- X_iobuff.sp is the top level circuit file created from the instantiated subcircuits in the SpiTran main window. This file contains the X elements, but does not include the Spice file that contains the definitions.
- confMin_iobuff.sp, confTyp_iobuff.sp, confMax_iobuff.sp contain data imported from separate min, typ, max library files, if used. These may be empty if your project does not use libraries.
- ModelMin.sp, ModelTyp.sp, and ModelMax.sp files simply include X_iobuff.sp and the conf files. These are passed as Model Files to s2ibis2 so that it will use them in addition to iobuff.sp.
- Other .sp files are created by s2ibis2 to perform each of it's simulation tests. These have the contents of iobuff.sp, one of the Model*.sp files, and additional SPICE statements.

- .spi files are copies of the .sp files created by s2ibis2. These will be present only if you run s2ibis2 more than once in the project directory.
- .lis files are the output listings from the SPICE simulator. These contain that waveform data that s2ibis2 reads.
- .msg files contain the console output from the SPICE simulator. You may have to check these to see if there were simulation failures.
- iobuff.ibs is the resulting IBIS file.

If you use the Cleanup option most of these files will be removed after running s2ibis2. Do this only after you have gotten a good IBIS file. The project directory may contain other files, depending on your simulator.