There was a download of PCCDU 7.1 on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. This program is a product of TOPCON. The following version: 7.1 is the most frequently downloaded one by the program users.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. Commonly, this program's installer has the following filename: PCCDU.EXE. PCCDU relates to System Utilities.
From the developer:
PC-CDU is a comprehensive Windows software product designed for controlling GPS+ receivers developed by the Topcon Positioning Systems company. It uses GPS Receiver Interface Language (GRIL) to configure various receiver settings and diagnose the receiver performance.
You may want to check out more software, such as Garmin StreetPilot i2/i3 North America or HanDBase® for Series 60, which might be similar to PCCDU.