bsnes/CHANGES.md

Change Log

Version 0.6

New/Improved Features

• Conditional r/w/rw debugger watchpoints
• Added the "!=" operator to the debugger
• Redefined the debugger input and output syntax, being more consistent with RGBDS
• Debugger now reads .sym files (Tested with 3 popular formats). It shows symbols when possible, and allows using them in expressions
• Debugger data types can now be either 16-bit values, or 25-bit full addresses that include a bank identifier
• Debugger commands and expressions support full addresses as parameters. This allows, for example, breaking on an address on a specific ROM bank, or reading a value from a specific MBC RAM bank.
• Some debugger commands may now run without breaking the debugger. (Similar to LLDB or GDB's async mode)
• SDL port now supports save states
• Improved performance by about 6% by enabling link-time optimizations
• Reduced file size by stripping executables
• Several Cocoa-only UX improvements:
  • Prevented being paused "twice" (Both by the pause option and the debugger)
  • Optional proportional resizing
  • Proper fullscreen support
  • Mouse cursor is now hidden while running

Accuracy Improvements/Fixes

This version includes major accuracy improvements, which allow it to pass 54 tests out of mooneye-gb's 58 acceptance tests (2 of which fail due to not including the original boot ROM); more than any other emulator.

• Rewritten MBC support, with MBC1M support (Fixing some N-in-1 cartridges)
• Major accuracy improvements to OAM DMA.
• Corrected a lot of instruction memory-access timings
• Corrected some IO register masks
• Major accuracy improvements to timers (TIMA/DIV)

Bug Fixes

• Corrected operator priorities in the debugger
• Fixed a bug where a breakpoint might have been ignored
• Reduced CPU usage when running games with a real time clock
• Handling ^C and ^D more sanely in SDL port
• Fixed memory leak in Cocoa

Misc Internal Changes

• Added infrared API, but it is not actually used by any of the GUIs
• Fixed build system bugs that caused needless dep file generation, and made the Cocoa build fail sometimes if SDL is not installed

Version 0.5

This version is not compatible with save states of older versions.

New/Improved Features

• Updated save state format, should now be much more future compatible
• Save state compatibility between 32 and 64 bit versions of SameBoy
• Cocoa version is now using OpenGL 3
• HQ2x filter added (Cocoa only)
• A new, redesigned OmniScale filter; old filter is renamed to OmniScale Legacy (Cocoa only)
• Cocoa port now "remembers" the last window size
• Added boolean operators to the debugger
• Added conditional breakpoints

Accuracy Improvements/Fixes

• Better emulation of certain behaviors of the SCX register
• Fixed emulation of the STOP instruction
• Minor fix to the accuracy of the JOYPAD register
• Minor improvements to HDMA accuracy

Bug Fixes

• Improved concurrency in the Cocoa port
• Fixed a bug where an emulator window in the Cocoa port will freeze until resized
• Fixed incorrect disassembler outputs
• Fixed a potential crash when deleting a breakpoint

Misc Internal Changes

• Large code refactoring, getting ready to stabilize API

Version 0.4

This version is not compatible with save states of older versions.

New/Improved Features

• Cocoa port now includes several scaling algorithms, including a beta of the exclusive OmniScale algorithm
• SDL port now includes sound support
• SDL port now includes battery save support

Accuracy Improvements/Fixes

• APU emulation now includes stereo support
• Improved PCM registers emulation
• More accurate STAT interrupt emulation. This fixes Altered Space.

Bug Fixes

• The Cocoa port ignored some key presses if the user keyboard layout included non-ASCII characters
• Fixed a bug that could cause a crash when adding or removing a breakpoint

Version 0.3

New/Improved Features

• New debugger command: cartridge (alias: mbc) shows information about the cartridge and the current status of the MBC
• Experimental debugger command: sld (Short for Stack Leak Detection) behaves similarly to finish, but stops if a stack leak or stack overflow is detected
• The Cocoa port now allows configuring controls

Accuracy Improvements/Fixes

• ROM banks now wrap (Fixes game: Pocket Monster Adventures (Bootleg))
• Fixed incorrect DMA behavior, DMA might fail for specific source addresses (Fixes game: The Smurfs 3)
• Timer registers were counting too slow in CGB double speed mode
• Corrected read behavior of the HDMA5 register (Fixes game: A Bug's Life in CGB mode)
• Fixed a bug with the CGB boot ROM that prevented initialization of the wave RAM
• The CGB boot ROM now loads the DMG tilemap for specific games, just like the original ROM (Fixes game: X (intro animation))
• Fixed a bug where audio channel 3 was playing silently while it should have been muted.

Bug Fixes

• Debugger's finish command now behaves correctly when interrupts are involved
• Corrected the description for the breakpoint command
• SameBoy will not create save files for ROMs without cartridge RAM or RTC, even if they report having a battery, preventing 0-bytes save files

Version 0.2

New/Improved Features

• Support for multiple breakpoints
• Better debugger command style and error reporting; includes help command
• In the SDL port, ^C in the terminal will break the debugger instead of quitting SameBoy
• Cocoa port now saves preferences (Model and frame blending)
• It is not possible to toggle console output and debugging in the Cocoa port

Accuracy Improvements/Fixes

• Read/write masks corrected for several registers
• Corrected 144th OAM interrupt behavior
• LCD operation moved to advance_cycles, fixing some obscure timing issues (Fixes game: X / Ekkusu)
• More accurate emulation of the registers controlling DMG emulation on CGB
• Emulation of PCM_12 and PCM_34 in the SDL port

Bug Fixes

• Debugger's next command can now exit a function

Version 0.1

• Initial public release