This release substantially improves PC Engine emulation, fixing 80% of known issues.
Regretfully, this will be my final release. I will be stepping down, and my emulators will be maintained going forward as a team project. I'll have more to say on this in the near future in a separate post.
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
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