I am seriously running out of ideas regarding a strange FPU bug that is related to my A4000 with 68060/50 Mhz in a Cyberstorm MK1. I am about to think that the hardware is defective, but then again, I might as well have misconfigured something.
The bug first appeared to me when I was still active on the Amiga about 10 years ago. It showed with the first demos that made good use of the FPU, e.g. Ride/Skarla, Cybercinematastic/Loonies, or IKAnim/Loonies.
What the bug does on my machine is that certain FPU calculations apparently return funny results which results in wobbly 3D scenes in the aforementioned demos. Sometimes, not all the time, the polygons are drawn all over the screen, or at least the textures are wobbling more than they normally would.
I can't quantify the effect of this bug any better at the moment, but I am writing this in the hope that I might possibly be able to patch those issues away.
Any ideas guys?
What versions of 68060.library, setpatch and other relevant tools are you using?
My Amiga is running OS3.0. See below for its config according to WhichAmiga.
WhichAmiga 1.3.23 (9.11.01)
Written by Harry "Piru" Sintonen. Copyright © 1995-2001 PitPlane Productions.
Evaluating system...
Central Processing Unit: MC68060 50.0 MHz (rev 1)
Floating Point Unit: 68060fpu 50.0 MHz
Memory Management Unit: 68060mmu running
Custom graphics chip: AGA Lisa 4203 (rev 0)
Custom animation chip: AGA PAL Alice 8374 2M (rev 3-4)
Other custom chip(s): Paula 8364 (rev 0), Ramsey (rev 15), Gary (rev 0)
Graphics system: CyberGraphX V3
Graphics board(s): CyberVision 64/3D
Hardware Clock: clock + battmem found, sunday 01-jan-1978 02:53:36
Max. Chipmem available: 2048 K
Max. Fastmem available: 94208 K
ROM chip version: 39.106 (Kickstart 3.0)
Workbench version: 39.29 (Workbench 3.0)
SetPatch version: 43.6
Your computer is an Amiga 4000.
