On 17 Jul 2003 at 10:32, Peter Moreton wrote:

> Hi Mark,
>
> Which FTDI drivers did you install? The VCP (Virtual COM port) or D2XX
> (Direct DLL) versions? - I recommend the VCP ones to get started with.

        Have installed the VCP drivers.

> Firstly uninstall whatever FTDI drivers are installed now, and restart
> W98. Then, plug in your FT232 board.

        Ok, done.

> What should happen (under W98) is that windows starts the 'New hardware
> dialogue', you say, 'install from a specific location' and browse to
> your copy of the VCP drivers, which then install OK because the driver
> inf file entries for VID & PID matches the VID & PID held on the FT232
> which default to VID=0401 and PID=6001.

        W98 doesn't start the 'New hardware dialogue', but set an 'unknown
device' with an yellow icon.

> If this process does not work, I'd be looking at the FT232 circuitry
> surrounding USBDM / USBDP, and the 6Mhz clock.

        Have verified the circuit more than once...

> Adding the external EEPROM allows you to program custom VID, PID and
> Device ID strings, but is not actually required for a basis USB - >
> RS232 converter.
>
> BTW, the FT232BM part replaces the FT8U232AM part, and has quite a few
> fixes, and is easier to use. I have designed boards using this 'BM'
> part, and have been very impressed with it.

        Maybe that would be the solution.

> Regards, Peter Moreton
>

        Thaks for your help!

        Mark

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