> I have run into this numerous times with USB adapters. The solution for
> me was not to use them if I can help it.
> For laptops they sell pcmcia cards that are about $20 and are real
> serial or real parallel ports. For desktops you can get the PCI cards
> for about the same price. It really is worth the cost to not have to
> wonder where the problem is when you are developing.
>
> The one I like  for laptops is :
> http://www.amazon.com/Connectivity-PCMCIA-Serial-RS232-Adapter/dp/B002TLT=
96Y


Note that most new (within the last several years at least) do not has=20
PCMCIA slots anymore but rather a new version that interfaces via USB or a=
=20
single lane PCI Express connection.

-- Bob Ammerman
RAm Systems

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