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Old 29 December 2013, 10:22   #530
Toni Wilen
WinUAE developer
 
Join Date: Aug 2001
Location: Hämeenlinna/Finland
Age: 42
Posts: 19,682
Quote:
Originally Posted by amilo3438 View Post
EDIT: Also the demo is from mid. 1994 -> http://janeway.exotica.org.uk/release.php?id=10031 ... and also works fine in emu on A500+ (ECS Full) ...
It could be that its not made for A500 at all ?!
Yeah, possibly it accidentally uses upper 1M of chip and gets random data (which is mirror of low 1M chip, some kind of random data makes it work, some causes glitches) if less than 2M chip ram.

Should be fixed now. It CPU writes to BPLCON0 (copper is used for color changes only) and in some rare situations when CPU didn't have as many free bus cycles, write was done one color clock cycle too late..
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