[time-nuts] usb serial converter

gary lists at lazygranch.com
Wed Jun 15 01:49:37 EDT 2011

Back in the day, we used something like that. Basically we were trying 
to bit bang SMBus coms. But that only worked for win2k. Ultimately we 
just put a uP on a demo board with a real serial port. You can only 
kludge so much before you appear flaky to your customers.

On 6/14/2011 9:56 PM, David J Taylor wrote:
> From: <lists at lazygranch.com>
> Sent: Wednesday, June 15, 2011 1:25 AM
> To: "Discussion of precise time and frequency measurement"
> <time-nuts at febo.com>
> Subject: Re: [time-nuts] usb serial converter
>> Just a side note here should it ever come up, those usb serial
>> converters don't work in DOS. DOS doesn't support USB. You can kind of
>> get them working in the so-called DOS window of 32 bit windows, but
>> many DOS apps won't work because DOS allowed from direct control of
>> the port and windows gets in the way.
> You might like to try UserPort:
> http://www.embeddedtronics.com/design&ideas.html
> which allows Windows programs full access to the ports you might need.
> I've used it to allow access to the parallel port bits under Windows XP.
> Cheers,
> David

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