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- From: stieber@Informatik.TU-Muenchen.DE (Christian Stieber)
- Newsgroups: comp.sys.amiga.misc,comp.sys.amiga.hardware
- Subject: Re: Commodore and XOR patent problem
- Message-ID: <2pocpl$rhi@hpsystem1.informatik.tu-muenchen.de>
- Date: 28 Apr 94 13:13:25 GMT
- References: <2pmn5f$8fo@charm.magnus.acs.ohio-state.edu> <2pnpqoINN5pb@uwm.edu>
- Followup-To: comp.sys.amiga.misc,comp.sys.amiga.hardware
- Organization: Technische Universitaet Muenchen, Germany
- Lines: 32
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- Xref: dd.chalmers.se comp.sys.amiga.misc:9962 comp.sys.amiga.hardware:13328
-
- Anthony J Moringello (anthonym@alpha1.csd.uwm.edu) wrote:
- : > assuming you are all correct about the patent on the xor system of cursor
- : > movement. Then my question is , Cant commodore develop and alternative way of
- : > moving that cursor?
- : I am sure they could, bu the other ay would be to save what is
- : under the cursor, draw the new image. Then when the cursor is moved,
- : replace the old data, and restart the cycle again.
- : With XOR, you simply draw the cursor. Period. This is a trick
- : any 12 year old programmer should be able to come up with...I did. How
- : CadTrak ever got a patent for that I'll never know.
- : Commodore nor anyone else (oops can I use NOR in that way? :-) )
- : should have to come up with another solution to such an intuitive solution.
-
- Let me "quote" Richard M. Stallmann, author of GNU-Emacs and GNU CC (well,
- it's not the exact wording... I just remember what he said):
- "If you are a new software company, you need 2 programmers and about 10
- lawyers, just to be able to make sure you don't violate any patents. You
- basically have to check *every single line of code* for possible patent
- violations, because even the most obvious solutions might be patented."
-
- Christian
-