andi wrote:
> Hi I'm new in interface programming, I usually used port address $378
> to access the parallel port LPT1, how if I'm using a usb to parallel
> converter (in case most current laptop doesn't provide the LPT port
> anymore, so I have to use such converter)? Do I have to use different
> address to access the LPT through USB?
>
> Thanx.

Providing you use the right address, no change is required, I believe. 
Operating systems such as Windows 2000 or XP will prevent direct port 
access unless a driver like UserPort is used:

  http://www.embeddedtronics.com/design&ideas.html

David 


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