If bitplane DMA was active behind vertical blanking, it was incorrectly used for automatic scaling horizontal start/end detection.
More horizontal start/end adjustments to exactly match 5.3.1 manual filter behavior.
TV overscan modes are now almost same as in older versions. Narrow is slightly wider.
Increased event queue buffer size, multiple audio channels with AUDxLEN=1 could overflow it.
When filter mode like autoscale detects mode change, force full redraw (without this fast mode lines are not guaranteed to be redrawn with correct position or blanking)
Borderblank 1 shres pixel early end emulation was incorrectly emulated also in border area. In some situations, when HDIW position and/or borderblank state was modified during border, it could have caused single wrong colored pixel glitches.
Fixed bitplane garbage in right side of display in some fast drawing mode conditions (Usually hires or shres and HDIW end was larger than bitplane end)
(Pointless) VHPOSW (like AR3 does) writes without CE caused graphics glitches in fast modes.
Line count OSD (313p etc) now shows "----" (like FPS counter) when display sync is not stable. Not very useful to show mostly random values in weird situations.
Fixed A1000 direct (without using boot ROM + KS disk) KS ROM loading.