486 Upgrade processor information: http://www.evertech.com/486up.html
Evergreen diagnostics: http://www.evertech.com/files.html
FTP directory of diagnostics: ftp://ftp.evertech.com/pub/utils
Filename of diagnostics ultility: etiutils.exe
FreeDOS homepage: http://www.freedos.org/
Caldera DR-DOS (evaluation): http://www.caldera.com/dos/