Snezziboy v0.2

Fixed vertical-sync so that games appear much smoother now.

Fixed the TXS instruction so that processor flags are not updated

Fixed the IO for WRAM write at IO addresses $2180-3 (Megaman7 sprites now appear)

Incorporated SNES Advance's SBC/ADC accurate implementations (Super Mario World now works)

Used a jump table to implement scanline skipping for $42 and $DB opcodes

Fixed scanline skipping to proceed to the next immediate interrupt when NMI, V+H IRQ is enabled. (MegamanX, Megaman7 runs faster)

Fixed 256 color background update (for mode 3) (Super Mario All-Stars title and menu selection now visible, Super Mario Bros, The Lost Worlds subgames seem playable with appropriate speed patch)

Fixed VRAM allocation for modes 2 and above (able to see blobs that have been dropped on the field) Known Issues:
VRAM writing sometime still screws up (Kirby's avalanche: can be worked around by pressing L+R+start to go to the config, and exiting the config screen again)

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