Date: Thu, 21 Jan 93 12:43:38 CST
From: (csaba AT vuse DOT vanderbilt DOT edu) <csaba AT vuse DOT vanderbilt DOT edu>
To: djgpp AT sun DOT soe DOT clarkson DOT edu
Subject: Re: Re: Advice wanted on how to release djgpp shareware renderer

On Thu, 21 Jan 93 11:37:42 EST,
  DJ Delorie writes:

>Shareware is considered commercial as far as the djgpp copyrights go.
>You have two choices: One, pay the royalty.  The number of "copies"
>sold is the number of payments you have received, since not all users
>comply with the shareware terms.  Two, keep go32 separate.  If you
>distribute go32 as a separate executable with its sources, then you
>comply with the GPL half of the copyright.  You could also give them a
>complete djgpp distribution.  Note that emu387 and my graphics drivers
>can be distributed without restriction, although sending the driver
>sources is recommended since not may cards are supported.  Csaba's
>drivers may not be redistributable under the same terms, I don't
>recall.

The rule for the graphics library (libgrx) is that you have to pay royalty 
if:

  (1) you use it in a commercial product, and
  (2) don't provide the libgrx sources with your distribution, and
  (3) don't even provide information to your users about how to get libgrx.

As far as my additional drivers go I don't claim copyright on them. You 
have to follow DJ's rules for his own drivers. It is because:

  (1) he specified the driver interface
  (2) the drivers must work together with his extender
  (3) I did not want to confuse people with issues like "whose driver is it"


Csaba Biegl
csaba AT vuse DOT vanderbilt DOT edu