[time-nuts] OT - USB to LPT Adapter - Does it exist?

[ct1dmk]

My impression is that old software that make their own timings
and devices depend on those timings may have issues due to the
fact that there is a delay from write to LPT to bits really appearing on
the DB25, albeit small but not that much predictable as it has
Windows plus USB in between. That being the case hardly has any solution
whatever USB interface implementation... except with a real LPT.
The stuff I've used was kind of asynchronous spi etc. I had zero issues
with that.

Luis Cupido.
ct1dmk.


On 1/11/2013 11:38 PM, GandalfG8 at aol.com wrote:
> Hi Luis
>
> No problem, and it's much better anyway to hear from someone  who's used
> it:-)
>
> I only took a quick look at the web site before and didn't see the self
> build instructions at that time, but having seen the SMD chip he's using I
> think asking for a price might be safer:-)
>
> I see from your earlier comments that you've used it ok with old
> programmers but on the page you've linked do he doesn't recommend that, have you
> come across any problems with this?
>
> Regards
>
> Nigel
> GM8PZR
>
>
> In a message dated 11/01/2013 20:15:15 GMT Standard Time, ct1dmk at gmail.com
> writes:
>
> Hi  Nigel,
>
> I missed your post before my reply to Joe, so I made no mention  to your
> suggestion.
> I have those and they are not a printer thing, they  really
> work low level. The list of programmers and bit oriented  stuff
> that was reported to work well is big and surely there are  more
> stuff that works that is not in the list...
>
> Joe,  take a  look a check if you app is reported  good:
>
> http://www-user.tu-chemnitz.de/~heha/bastelecke/Rund%20um%20den%20PC/USB2LPT
> /liste.en.htm
>
>
> Cheers.
>
> Luis  Cupido
> ct1dmk.
>
>
>
> On 1/11/2013 5:03 PM, GandalfG8 at aol.com  wrote:
>> Hi Joe
>>
>> As per other replies I was going to  suggest this won't work because  USB
>> adapters are for printing  only and my solution would be to buy an old
> 486 or
>> early pentium  laptop and use that, I've bought several over the past few
>> years   for really silly money on Ebay for this very reason, but I have
> come
>>   across what  might be a possible solution....
>>
>>
> _http://www-user.tu-chemnitz.de/~heha/bastelecke/Rund%20um%20den%20PC/USB2LP
>>   T/index.html.en_
>>
> (http://www-user.tu-chemnitz.de/~heha/bastelecke/Rund%20um%20den%20PC/USB2LPT/index.html.en)
>>
>>   I can't vouch for this, just found it via Google, and although the
> drivers
>> are downloadable you need to buy the adapter and have to email  for
> prices,
>> but it might be worth a try.
>>
>> My  preferrred solution would still be the old laptop:-)
>>
>>   Regards
>>
>> Nigel
>> GM8PZR
>>
>>
>> In a  message dated 11/01/2013 13:09:45 GMT Standard Time, jltran at att.net
>>   writes:
>>
>> Not sure  where to ask this question but thought  I would start here.
>>
>> Is  there a way to connect a parallel  port to a computer via USB?  Not  a
>> device that shows up as  'USB Print Support' but, instead, shows up in
>> Device
>> Manager  as an LPT port?  I have been able to do it via PCMCIA  to
> Parallel
>> Port adapters but I have never found a USB device that would  do  this.
>>
>> My goal is to connect a parallel port chip  programmer via USB but  the
>> software only looks for LPT  ports.  It works with PCMCIA to  parallel
> port
>> adapters but  I haven't solved the puzzle yet with a USB  connected
> device.
>>
>> Thanks in advance.
>> Joe
>>
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