Serial and USB Adapter History

CompuTrainer™ and Velotron™ have used a variety of methods to connect the computer to the trainer. Below is a list of adapters and a type.

Make note of the type you are using, especially if you are filling out a support request form. Click on the pictures to see a larger image.


9 and 25-pin serial adapters


Before there was a thing called USB, there was CompuTrainer. Here are the serial adapters supplied when serial ports were common.


Type 1 25-pin serial ports were supplied with the very early PC
systems, as well as with some Nintedo-to-PC applications.
Type 2 9-pin serial ports were supplied for about 10 years
and were found until 2011 on some MultiRider Systems.


Prolific-based USB adapters


We are still using a 9-pin serial adapters even as USB connectivity was gaining ground. As computers abandoned serial ports altogether, we began supplying USB-to-Serial adapters. The first group used a Prolific-based communication chip.


Type 3 Bafo adapters were supplied in the early post-millennial years
and were quickly replaced when they were discontinued.
Type 4 Sewell adapters were supplied in the early post-millennial years
and were replaced when they were began to display communication
errors post-release of Windows XP™.
Type 5 Belkin adapters were supplied only with Velotron and were replaced
when FTDI adapters came on-line in the market.


FTDI-based USB adapters


The first USB to serial adapter from FTDI replaced the Sewell adapter when support from Prolific/Sewell failed to resolve connectivity issues we started to see with Windows XP. Eventually we contracted with FTDI to produce our custom USB adapter to eliminate the serial port component and go directly USB to the stereo-style communication cable.


Type 6 First adaptation to FTDI adapters were using this model
and when it became apparent FTDI adapters were superior,
we contracted with them to make Type 7, below.
Type 7 Our current FTDI adapters are of this model and are custom made
for us by FTDI. These were the first adapters to finally
eliminate the need for 9-pin serial port adapters.