WinUAE v4.9.1 Beta 4 is released. WinUAE is the commodore amiga emulator for Windows. WinUAE is a mostly complete software emulation of the hardware of the Commodore Amiga 500/1000/2000. A Commodore Amiga, for those who don’t know, is a 16/32 bit computer system based on the Motorola 680×0 CPU and a few specially designed custom chips that provide very good graphics and sound capabilities. Its first incarnation, the A1000, appeared in 1985, followed by the highly successful A500 and A2000 models. WinUAE is a port of the originally written for Unixish systems UAE; but over time, it seems the Windows port, WinUAE has become the best version available on any platform. WinUAE is free software: you are welcome to distribute copies of it and/or modify it, under certain conditions. There is no warranty of any kind for UAE. For more details concerning these issues, please read the GNU General Public License, which describes the terms under which WinUAE is distributed.

WinUAE v4.9.1 Beta 4 changelog:
- uaegfx overlay wasn't synced with screen dragging. It still works strangely if screen with overlay is not in front screen because Picasso96 does not yet support overlay fully during screen dragging.
- Reset filter button didn't reset manual filter settings.
- Added IDE scsi.device disable option to misc panel list.
- if number of planes changed mid scanline, whole line was drawn using planecount that was active when line started. If plane count was increased mid scanline, line was still drawn using lower plane count. If plane count was lowered, output was correct. (vAmiga test)
- Fixed x86 bridgeboard (AT variants only) boot crash if optimized build. Not sure if it was compiler bug or something else but I found a way to work around it. I think this exact same bug has happened previously.
- A1000 left hblank ends 3 lores pixels later than other models.
Later 4.9.0 beta series introduced bugs:
- If VSYNC starts after vertical wraparound (can happen in programmed modes), lines after wraparound before VSYNC was not drawn.
- HCENTER (ECS Denise only) "blanking" didn't work.
- Left side didn't open far enough in extreme overscan mode.
- OCS Agnus + OCS Denise: last blanked line bug on top of screen was not visible if line also had bitplane enabled.
- Direct 3D 11 mode shader buffer leak fixed. Caused crash after few dozens or so display mode switches. (4.9.0)

Download: WinUAE v4.9.1 Beta 4 x86
Download: WinUAE v4.9.1 Beta 4 x64
Source: Here