Snezziboy 0.25 released

[Robert]

SNES emulator for GBA

 

Notes: v0.25 ----- Fixes and Features:

- Fixed a bug with the reading of registers $2137/$213C/$213D (Final Fantasy Mystic Quest is able to proceed to the title screen)

- Fixed a critical bug with the MVN/MVP instructions to handle the A register correctly in 8-bit mode.

- Fixed a DMA bug so that the incrementing of the source address does not affect the address bank. (Final Fantasy Mystic no longer crashes and now seems playable)

- Fixed a bug with the DMA transfer to correctly increment the source address depending on the DMA increment mode. (Secret of Mana no longer crashes before the first dungeon)

- Fixed a bug with the RESET function that causes backgrounds remain stationary after using the configuration's RESET option.

- Fixed the SBC instruction to take care of decimal mode subtraction (uses modified code from SNES Advance) (Zombies ate my Neighbors is now playable)

- Fixed Mode 7 where there was once a band appearing at the top of the screen.

- Fixed (partially) SNES additive transparencies.

- Implemented Mode 7 wraparound based on register $211A. HDMA:

- Implemented partial HDMA for background scrolling positions (Donkey Kong 3, first level moves as expected) (Street Fighter 2 background moves as expected) (Castlevania X first level background effects visible) (HDMA is slow on the GBA and is expected)

- Implemented new option to enable/disable HDMA (for games that don't necessarily require it)

 

Optimizations:

- Made slight optimizations to instructions that operate on the A register, and certain jump instructions

- Made major optimizations to all instructions to remove instruction to add to SnesPC register (Credit to Gladius for the suggestion; most games should experience a slight but notable increase in speed)

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