First post, by Great Hierophant
- Rank
- l33t
This is this demo called Copper, and it apparently requires very particular VGA hardware to get it to work fully on a particular system.
DOSBox 0.74 SVN r3408 with vgaonly comes the closest I have yet seen to getting through the demo correctly. Here is an outline of the demo's effects :
A - COPPER
B - Parallax Bars x 3
C - Copper Bars x 2
D - Wobble x 4
E - Picture by J.O.E
F - Line-fading x 2
G - Flicker Free Flood Effects x 2
H - Y-zooming
I - Water Effects
J - Y-zooming and Wobbling x 3
K - Zooming
Of all the effects shown in the demo, DOSBox currently cannot do anything related to Wobble (D, J). Thats the bad news. The good news is that it seems to do everything else 100% correctly. It even handles some effects that draw a blank screen on my real hardware.
My 486 with an S3 805 VLB card cannot do the wobble correctly (interfers with the screen stability), E only shows 2/3rds of the picture, F & K do not show up at all and I had some problems. I can get the wobble to work properly with an IBM VGA card, but the E has the same problem and F & K only show a black screen.
The readme with the demo seems to indicate that cards with the Tseng ET3000 and ET4000 chipsets were appropriate to view all the demo's effects, but even they had some trouble on certain systems.
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