WinUAE v4.9.1 Beta 2 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 2 changelog:
- Adjusted programmed mode size/position calculation.
- Adjusted copper emulation, waits for too large horizontal position woke up normally.
- Delay warp mode automatic key release by few frames, some programs might not like immediate keypress/release pair.
- Windows event processing change fix.
- Border "bug" emulated (ECS Denise and AGA, does not affect OCS Denise). If bitplane DMA (BPL1DAT) happens inside VBLANK, border state gets disabled, when first non-VB line starts, line stripe from HDIW start to first BPL1DAT is still in "not border" state: sprites are visible and borderblank does not affect it. This happens because border state normally gets enabled when HBLANK goes from inactive to active state but it looks like HBLANK does not affect border state inside VBLANK. It can also happen during later scanlines if programmed HBLANK starts too early, before last BPL1DAT access. (HBLANK enables border, BPL1DAT access disables it again).

Download: WinUAE v4.9.1 Beta 2 x86
Download: WinUAE v4.9.1 Beta 2 x64
Source: Here