Checksum: 06997 Path: utzoo!utgpu!anakin 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: Reply-To: anakin@gpu.utcs.UUCP (Anakin Research) In article 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