I think I understand that issue. Sometimes the driver issues a data available 
signal but when you subsequently ask for the data, none is there.  My view is 
that this boundary condition could have been handled a bit better by the MS VB 
common communications DLL, but my view doesn't help the poor guy using That 
DLL. 

You make a good point, but I'm not sure Prolific is entirely at fault here. 

Dick, K6KR

On Dec 25, 2010, at 14:15, WILLIS COOKE <[email protected]> wrote:

> Dick, I had no difficulty with the Elecraft supplied K3 utilities, but could 
> not control the K3 from N1MM and XMLog.  These logging programs were complied 
> using Visual Basic and I was told that the Prolific driver and Visual Basic 
> had a register conflict.  When I bought the PCIe RS-232 card it cured my 
> problems and I have not worried with it since.  I got the latest Prolific 
> drivers from the web site a little over a year ago, but have not updated them 
> since I quit using the Elecraft supplied Prolific converter. 
>  
> Willis 'Cookie' Cooke 
> K5EWJ
> 
> 
> From: Dick Dievendorff <[email protected]>
> To: WILLIS COOKE <[email protected]>
> Cc: Robert Redmon <[email protected]>; "[email protected]" 
> <[email protected]>
> Sent: Sat, December 25, 2010 3:49:16 PM
> Subject: Re: [Elecraft] Windows 7 64bit and USB to RS232 adapter
> 
> I use an older Prolific based KUSB with my Windows 7 64 bit system that I use 
> to develop and test the various Elecraft Utilities.  I got my drivers from 
> the Prolific web site listed in K3 Utility Help, see Troubleshooting USB to 
> serial adapters section. 
> 
> Dick, K6KR
> 
> On Dec 25, 2010, at 12:57, WILLIS COOKE <[email protected]> wrote:
> 
> > Bob, the Prolific converters do not work well with W7.  I have been using 
> > W7 
> > with my K3 for over a year with a PCIe card RS-232 port.  It worked the 
> > first 
> > time with no problems.  Elecraf has quit selling the Prolific converter, 
> > but the 
> > one they were selling two years ago was Prolific.  I think that some are 
> > having 
> > good results from the FTDI chip set converters which Elecraft is shipping 
> > now.  
> > You will need the latest drivers which are available from the FTDI web 
> > site.  
> > Surely Prolific will eventually get their act together and publish a driver 
> > which will work with W7, maybe they have by now.
> >  Willis 'Cookie' Cooke 
> > K5EWJ 
> > 
> > 
> > 
> > 
> > ________________________________
> > From: Robert Redmon <[email protected]>
> > To: [email protected]
> > Sent: Sat, December 25, 2010 2:26:43 PM
> > Subject: [Elecraft] Windows 7 64bit and USB to RS232 adapter
> > 
> > I have a new laptop with W7/64bit and can't get my USB/Serial adapter to 
> > work (with my K3). It all works fine on my XP (32bit) computers. Anyone 
> > who can help?
> > 
> > 73, Bob K5SM
> > ______________________________________________________________
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