> I am thinking that it is not the programmer, but something probably in
> the USB driver interacting with different versions of Windows.  But I
> don't know how to narrow this down.
>
> I have tried it on the following machines.
>     Windows XP Pro (no SP) Notebook - works
>     2x Windows ME (unknown SP) - works
>     2x Windows XP Pro SP1 desktop - does not work
>     Windows 2000 SP3 desktop - does not work
>     Windows XP Home SP1 notebook - does not work

There are issues with WinXP SP1 (it may be the same with Win 2k
SP3) and the FTDI drivers. See www.ftdi.com for an explanation and a
long winded fix.

I've just been through this in the last couple of days.
I found that if you remove any reference to FTDI in the Add/remove
programs and then specify a location at the driver installation phase, it
will load up your drivers correctly. There may be situations where that
doesn't work, but it was enough for my needs.

Steve.


==========================================
Steve Baldwin                          Electronic Product Design
TLA Microsystems Ltd             Microcontroller Specialists
PO Box 15-680, New Lynn                http://www.tla.co.nz
Auckland, New Zealand                     ph  +64 9 820-2221
email: steve@tla.co.nz                      fax +64 9 820-1929
=========================================

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