[Core/MD] added support for Thunderbolt II (unlicensed) copy protection
[Core/VDP] improved H-Counter accuracy in H32 mode (modified in r457 for Sonic 3D Blast bonus stage, not needed anymore)
[Core/VDP] improved FIFO timings accuracy (fixes "Overdrive" Demo)
[Core/VDP] improved Mode 5 sprites rendering (fixes "Overdrive" demo)
[Core/VDP] fixed V28/V30 mode switching during active display (verified on real hardware)
[Core/VDP] implemented proper FIFO ring-buffer & unused bits behavior on CRAM/VSRAM reads (verified on real hardware)
[Core/VDP] improved accuracy of DMA Copy/Fill & added support for CRAM/VSRAM Fill (verified on real hardware)
[Core/MCD] improved Main-CPU & Sub-CPU idle loop detection (fixes "Super League CD")
[Core/MCD] added CDC & GFX register polling detection / synchronization
[Core/MCD] fixed pending level 1 interrupts when GFX interrupt is disabled (fixes random freezes out of "Batman Returns" option menu)
[Core/MCD] improved Sub-CPU synchronization with Main-CPU (fixes "Soul Star")
[Core/MCD] fixed access to "write-only" communication flags from Main-CPU & SUB-CPU (verified on real hardware by Notaz)
[Core/MCD] disabled CD hardware reset on Soft-Reset (verified on real hardware)
[Core/VDP] added some 68k cycles delay on invalid VRAM writes to simulate periodical 68k wait-states (fixes "Microcosm" intro loop)
[Core/MD] bump-up savestate version
[Core/VDP] added some precision in comments about delay on invalid VRAM writes
updated file header