Path: utzoo!attcan!uunet!lll-winken!ames!pasteur!ucbvax!hplabs!hp-pcd!hpcvlx!harry
From: harry@hpcvlx.HP.COM (Harry Phinney)
Newsgroups: comp.sys.hp
Subject: Re: X windows R3 on catseye monitor
Message-ID: <101950019@hpcvlx.HP.COM>
Date: 23 Jan 89 22:55:15 GMT
References: <578@palantir.gsfc.nasa.gov>
Organization: Hewlett-Packard Co., Corvallis, OR, USA
Lines: 21

mjb%hoosier.utah.edu@wasatch.UUCP (Mark J. Bradakis) writes:
 
>> I am still very curious as to why this works, any ideas? The machine is
>>a HP 9000/360CH. Is it possible that this machine has a catseye monitor, but
>>a topcat controller chip ?

> The Catseye uses a lot of the same register control info as the Topcat.  

This is true.  The Catseye is (to a certain extent) Topcat-compatible.
There are small "gotchas", and the original author's menu/cursor
"droppings" are one result.  The Topcat server distributed on the MIT
tape, when suitably modified, will basically work on a Catseye, but
*there will be bugs*.  The Catseye is not a Topcat with more planes and
pixels.

The HP X11 Window System product supports the Catseye, and the server
has nearly (but not quite) all the R3 bug fixes AND backing store.
You'll also find that the product Catseye code is significantly faster
in some operations than the Topcat code.

Harry Phinney