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From: anakin@gpu.utcs.toronto.edu (Anakin Research)
Date: Sat, 12-Nov-88 23:51:23 EST
Message-ID: <1988Nov12.235123.5006@gpu.utcs.toronto.edu>
Organization: University of Toronto Computing Services
Newsgroups: comp.sys.amiga
Subject: Re: 1.3's 68881 Problem...
References: <QXSvC3R98k-0M9d1ok@andrew.cmu.edu>
Reply-To: anakin@gpu.utcs.UUCP (Anakin Research)

In article <QXSvC3R98k-0M9d1ok@andrew.cmu.edu> rg20+@andrew.cmu.edu (Rick Francis Golembiewski) writes:
>I finally got my 1.3 Enhancer Package, but low and behold after fooling
>around with it for a while I discovered that the 1.3 IEEE Libraries were not
>fully compatible with the Beta IEEE Libraries.  I tested a few programs I had
>written (under Lattice 4.01) which worked nicely with the old Beta Libs, but
>now it loads the IEEE Library, but it doesn't make use of the 68881 (This is
>easily noticed in speed, since you get get nearly a 30x speed increase for
>Trig functions).  In fact I went back and Tried the Demos (FFuz, Fuz, and
>FTrans) and the results were that only Fuz actually used the 68881 (Fuz was
>compiled using Manx, however there is a provision to compile using Lattice
>using Lattice Libraries...).   So, what's the deal is this a bug that wasn't
>noticed?  (I like to actually control when/if the Math library is opened in
>the program, but the methiod to do this now will NOT access the '881, while
>it did for the Beta version [and was the suggested methiod to use the '81
>for Lattice]).
>
>Also, along the same lines, does anyone know if it would be possible to have
>a replacement math.library that could just pass the calls to the IEE.libraries?
>The reason I ask is that (currently) most programs that would benifit the most
>from really fast math use the regular Math.library (ie Sculpt 3D, Photon Paint,
>etc.).  and it would be nice to be able to just have a dummy math.library that
>opened up the IEE.library and just passed the calls and returned the value to
>a program.
>
>As an aside, does anyone know how the Lucas board works with the 1.3 Math
>Libraries?  (I'de certainly like to have the '20 using the '881 as a
>co-processor, instead of a perif. devce...).
>
>Enough Ramblings...
>+----------------------------------------------------------------------------+
>| Disclaimer: Me?  Post That, impossible I never post anything...            |
>| TypetoYouLater(Everyone); --> "functional Good bye"....                    |
>| Rick Golembiewski [ Pronunciation is half the Battle, spelling the other]  |
>+----------------------------------------------------------------------------+

I've been running the Lucas board and 1.3 so far with no problems. Sculpt
4D is wonderful as is draw 2000. I'll check to see if I can specifically
find this bug in the library.
					Brad Fowles

