Forum TI-Planet.org

Added

• Game Boy Color support.
• GBA backwards-compatibility to unlock features in some GBC games.
• Color correction to approximate the color spectrum of a GBC or GBA screen, leveraging native gamma settings.
• Game Boy Color skin for no-scaling mode.
• Brightness change hotkeys usable in menus.

Changed

• Confirmation setting for Load State now also applies to Restart Game.
• Various improvements to the menu, courtesy of runer112:
  
  • Mark per-game options instead of global options with an asterisk.
    
  • Improved menu item alignment and font.
• Majorly rewrite the CPU emulation to improve performance and flexibility of memory access emulation.
  
  • Rearrange the JIT's static register allocation and the ABI of routines called from it.
    
  • Remove dynamically-generated per-opcode memory routines, reducing overhead of memory region selection.
    
  • For special memory accesses (I/O reads or non-RAM writes), dynamically generate minimal trampolines instead.
    
  • For writes to MBC registers, directly use a routine for the specific register to remove range-checking overhead.
    
  • Always pass valid timing info to memory accesses which may require it, removing the need for validity checks.
    
  • Enable complex memory instructions to directly read/write RAM, such as bitwise operations and INC/DEC (HL).
    
  • Allow absolute reads/writes to have variable-length implementations, for better performance with banked memory.
    
  • Change stack bounds-checking to speed up close SP modifications (INC/DEC/ADD SP) and free up a register.
    
  • Use inclusive bounds for the stack to avoid thrashing when touching the high edge of a memory region.
    
  • Improve performance of return prediction by ignoring the stack offset unless the prediction misses.
    
  • Improve performance of self-modifying code checks by using 24-bit comparisons.
    
  • Improve performance of self-modifying JP instructions by using dynamic dispatch instead of recompiling.
    
  • Expand the list of supported instructions in waitloop detection to reduce false negatives.
    
  • Optimize ROM bank switching routine at ROM load time based on the ROM size, to eliminate redundant masking.
    
  • Simplify MBC3 RTC bank switching by handling RTC updates immediately before register writes.
• Refactor the PPU scheduler to speed up writes to STAT and LYC registers.
  
  • Predict future writes to the LYC register based on previous frames, to avoid excessive rescheduling.
    
  • Remove post-vblank event cache to simplify all reschedules, and determine the event only when vblank is reached.

Fixed

• Reduce SPI transfer clock to fix glitchy display on some calculator revisions.
• Increase Flash wait states for increased stability on some calculator revisions.
• Fix game screen corruption in the main menu when showing a confirmation dialog.
• Fix garbled character display when internal ROM title contains invalid characters.
• Fix corruption of a couple of pixels when restoring the home screen.
• Implement more accurate open-bus read behavior for disabled cartridge RAM.
• Implement correct mirroring behavior for MBC2 cartridge RAM.
• Fix reads past the end of ROM banks trimmed by the ROM converter.
• Fix conditions for the window trigger to include writes to LCDC or WY during hblank.
• Fix display of mid-frame sprite changes resulting from direct OAM writes.
• Allow NR30 writes to disable audio channel 3.
• Fix a scheduler edge case which could cause crashes in some games. Fixes Space Invaders (Japan).