For installing the A/D converter simulation package do the following steps: 1) Ptolemy must be installed on your System except you are interested in the source code only. If Ptolemy is not installed you can get it and its documentation from http://ptolemy.eecs.berkeley.edu/. 2) If not already done, download the file adc.tgz via ftp://ftp.mathematik.tu-ilmenau.de/pub/numerik/adc.tgz. 3) Move the file adc.tgz to the location where you want to install this package. 4) Untar the file with the command 'gtar -xzf adc.tgz'. (Note: 'gtar' may be renamed as 'tar'.) If gnu's tar is not installed on your system try the following: mv adc.tgz adc.tar.gz gunzip adc.tar.gz tar -xf adc.tar (If this still does not work consider consulting your system administrator.) This step will create two directories 'adc' and 'ivps' as well as the files 'INSTALL' and 'adc.ps'. 'adc' contains the simulation package, 'ivps' some differential equations 'INSTALL' is this file and 'adc.ps' the complete documentation. 5) Change to the directory 'adc': 'cd adc'. 6) Run the script 'setup'. This will invoke the Ptolemy utility program 'masters` to set the paths to correct values. (Note: If you move the package, you must invoke 'setup' again.) If your Ptolemy is in standard installation, no further adjustments are necessary. You may check this with 'masters': Type 'masters facets/ad1' and enter the command '?', if the path starting with '$PTOLEMY' is labeled as invalid then you need to set this too. Ask your system administrator which paths are changed to what values. Look at the command in 'setup' how to set this paths. 7) Now you are ready to use the package, the central facet is in 'adc/adc.pal', open it with the open-facet-command (F) within Ptolemy.