The end by trilobit
Reminder about this one, still missing a comment?! (Probably has not been explained well there. It doesnt work on OCS as need ECS Agnus 1mb chip ram.)
Tested on beta 7 A500 ECS Agnus 1mb chip (see on pic. 2).
EDIT: It looks to working fine in WinUAE2.6.1 (last official) version! (see on pic.3)
EDIT2: It seems to be broken starting from beta 4 version!