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EmuCR: byuubyuu v4 is released. byuu is a multi-system emulator that focuses on accuracy and ease-of-use. It is currently in early release beta status. byuu is an upcoming multi-system emulator that aims to provide the accuracy of higan, with the ease-of-use of bsnes. It seeks to accomplish this by catering to the common 99% of use cases, rather than higan, which tries to cater to every niche. As such, certain advanced functionality will not be available in byuu; however, the emulator will be significantly easier to use, like bsnes.

Planned roadmap:
v1: support for gamepad mapping and the save state manager
v2: support for other controller types (mice, light guns) and multiple-players
v3: support for Famicom Disk System, Super Game Boy, and Sega CD emulation
v?: support for per-system input mapping, cheat codes, movie recording, and run-ahead functionality
v?+X: optional scanline renderers for each core to boost performance substantially
v?+Y: additional emulation cores from outside of higan (PS1, Saturn, N64 would be most promising!)

byuu v4 changelog:
– PC Engine: improved IRQ handling significantly
– PC Engine: fixed T-flag instructions, and implemented all addressing modes for it
– PC Engine: improved VDP penalty cycle timing
– PC Engine: always fire Vblank IRQs every frame, regardless of VDW setting
– PC Engine: add support for STreet Fighter II CE’s custom mapper
– PC Engine: emulated MPR latch used by TMA and TAM instructions
– PC Engine: randomize various registers and memory at power-on
– PC Engine: do not allow block moves to read from $ff:0800-17ff
– PC Engine: always set P.B flag (except when pushing P during BRK)
– PC Engine: delay PSG synchronization when not needed (~8% speedup for accuracy profile)
– PC Engine: emulate 4-color background and sprite modes
– PC Engine: emulate grayscale VCE mode
– PC Engine: emulate extra scanline VCE mode
– PC Engine: fixed VRAM->VRAM DMA transfers (was transferring one byte less than it should)
– PC Engine: improve burst-mode emulation (early VRAM->VRAM termination, etc)
– PC Engine: add display timing latching to the performance profile’s scanline renderer
– PC Engine: many disassembler improvements
– PC Engine CD: added skeleton implementation (non-functional)
– Mega Drive: fix a crash when loading Sonic & Knuckles or the Game Genie without a daughter cartridge connected
– higan: fix System menu option enabling when « Create New System » is selected
icarus: fix typo in save RAM portion of Master System game manifests (was marked as ROM by mistake)
– byuu: don’t show the program icon briefly when loading a new game
– byuu: focus the viewport after loading games
– byuu: add trace log path override option
– byuu: use save path override for SNES save RAM files as well

Download: byuu v4
Source:Here

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