EmuNations

--0.6.1--

Bugfixes

• Fixed build script so controller images are actually included so UI doesn't crash

• Disabled most bindings when UI active (fixes crashes/wonkiness when pressing certain keys)

• Fixed Windows implementation of get_config_dir() so config file ends up in %localappdata%\blastem like it should

• Fixed the location of sticky_path on all platforms

• Added virtual root directory used by ROM UI to new Nuklear UI

--0.6.0--

New Features

• New Nuklear UI with almost complete access to configuration options

• Added support for creating SDL2 mappings from inside the emulator

• Loading ROMs from ZIP archives is now supported

• Loading gzip compressed ROMs is now supported

• Internal screenshots can now be in PNG format

• New VDP plane debug view

• VDP debug views are now in separate windows

• Experimental support for sync to video (not enabled by default)

• Preliminary support for MegaWifi cart emulation

Bugfixes

• Fixed a number of 68K decoder bugs (mostly illegal instruction decoding)

• Fixed implementation of the UNLK instruction when register is a7

• Fixed a number of memory leaks

Accuracy/Completeness Improvements

• Added support for J-Cart emulation

• Implemented Z80 interrupt mode 2

• Fixed the timing of a number of 68K instructions

• Fixed the timing of the Z80 JP cc, nn instruction

• Fixed the order bytes of a word are written to VRAM from the FIFO (fixes minor corruption in Road Rash 3 bike menu)

Other Changes

• Added support for Open GL ES in addition to the existing desktop GL support

• Some small optimizations

• Added ROM DB entry for Squirrel King to support it's copy protection

• Added support for float32 audio output (fixes an issue with defautl SDL2 driver in Windows when using more recent SDL2 versions)

--0.5.1--

New Features

• Drag and Drop is now supported for loading ROMs

• Save states are now supported for SMS games

• Texture scaling method (linear or nearest neighbor) can now be selected in both renderers

• Menu now filters files based on a configurable extension list

• Lock on carts (Sonic & Knuckles and XBAND) can now be loaded via the menu

• ROMs can be reloaded via a hotkey (defaults to F5)

• Last path visited in the menu is now saved between runs (can be turned off via config)

• Window height can now be specified in the config file

Bugfixes

• Default shader doesn't look like garbage in interlaced mode anymore

• Framebuffer pointers are properly released and reacquired on context switch (no more LOCKRECT errors)

• ROMs specifying SRAM at the normal RAM address no longer cause a crash

• Fixed an edge case in the s(tep) debugger command

• Entering the option menu in Dragon's Fury no longer results in a fatal error in 32-bit builds

• Screen is properly cleared so garbage will not appear when the window does not match the emulated display size

• Fixed a regression in XBAND keyboard support

Accuracy/Completeness Improvements

• Locking on Sonic 3 to S&K will now use Sonic 3's save RAM

• Locking on a 4MB cart to S&K will now behave like on hardware

• Support for several X-in-1 bootleg carts has been added

• DMA from byte-wide SRAM now yields correct results

• VScroll is now latched earlier in the line (fixes minor glithces in Top Gear 2 and Skitchin)

• Sega/SSF2 mapper support now handles homebrew that uses SRAM

• ODD flag timing now matches hardware

• V counter as read from HV port is now correct in single-resolution interlace mode

Other Changes

• Added a "subtle" CRT shader contributed by Anaël Seghezzi

• Mouse is now only captured if an emulated mouse is plugged in to the emulated system

• Missing mapping warnings will only be displayed for the first mapping of a controller

• Save states now default to a format native to BlastEm

• Remaining I2C EEPROM games have been added to the ROM DB

• When not specified, height now respects the aspect setting rather than assuming 4:3

• Pre-combined S&K ROMs and large (>2MB) S&K hacks should now work

• Using ui.exit (default Escape) can now be used to cleanly cancel a load ROM or savestate action

• Save states are now allowed in a more extensive range of Z80 states, fixing save state saving in some games

--0.5.0--

New Features

• SMS emulation in the form of the Gensis/MD's backwards compatibility mode

• Added support for SMS controllers

• Support for the mapper used by Realtec games

• Support for carts with fixed value registers

• Support for enough of the XBAND cartridge hardware to allow the menu to boot

• Basic XBAND keyboard emulation

• Configurable display overscan

• Fullscreen mode can now be toggled at runtime

• Window can now be resized at runtime

• Support for "semantic" controller button names in the gamepad mapping using SDL2's game controller API

• Analog axes can now be mapped to emulated gamepad buttons or UI actions

• System soft reset

• Keyboard can now be captured when a Saturn or XBAND keyboard is connected to the emulated system

• Internal screenshots that bypass all output filtering/overscan

• Homebrew using the "SSF2 Mapper" is now supported via header detection like on the Mega Everdrive

• Directory used for SRAM, EEPROM and savestates is now configurable

• Path configuration values can now contain both BlastEm-specific and environment variable references

• Open GL based rendering can be disabled in favor of the SDL2 render API fallback

Bugfixes

• Fixed a bug that would cause a crash in certain games that have SRAM and ROM at the same address

• Fixed some issues with Z80 interrupts that caused issues with sound/music in Sonic 2 and Puyo Puyo 2

• Z80 debugger no longer crashes when resuming execution

• Undocumented Z80 instruction "out (c), 0" now decodes properly

• GDB remote debugging should now work with more recent versions of GDB

• GDB remote debugging should now work on more recent versions of Windows

• Overlapping instructions in self-modifying code no longer causes incorrect behavior

• Z80 instructions "in c" and "out c" now work correclty on 32-bit builds

• Specifying an output audio frequency higher than the FM frequency no longer deadlocks the emulator

• Fixed memory map generation for games with 3MB ROM and SRAM at the 3MB mark

Accuracy/Completeness Improvements

• YM2612 SSG-EG and CSM modes are now implemented

• VDP Mode 4 is now implemented in both Genesis and SMS mode

• Basic emulation of refresh delays has been added

• 68K interrupt latency has been made more accurate

• CRAM contention artifacts (aka CRAM dots) are now emulated

• DIVU/DIVS and MULU/MULS are now cycle accurate

• MOVEM now performs the extra ignored read and has correct timing

• The timing of serveral other 68K instructions has been fixed

• Implemented 68K trace mode

• SBCD flag calculation now matches hardware in 100% of cases

• 68K -> VDP DMA now properly has a delay at DMA start rather than at the end of the transfer

• A number of illegal effective address mode/operation combinations now properly decode as illegal instructions

• Added emulation of the slow rise time of an IO pin that was changed to an input when it was previously outputting 0

• Partial support for the VDP test register

• Partial support for the 128KB VRAM mode bit

• Improved accuracy of low level sprite rendering details

• Fixed handling of active/passive display transitions so that border extension tricks work

• Fixed handling of horizontal interrupts in extended display areas

• More accurate correspondance between horizontal counter and raster beam

• Partial emulation of serial IO registers

Other Changes

• Added Japanese version of Street Fighter 2: The New Challengers to ROM DB

• Added the following EEPROM games to the ROM DB:Ninja Burai Densetsu
  Rockman Mega World

• Added ROM DB entries for the following games with incorrect region headers:Another World (E)
  Alien Soldier (J)
  Light Crusader (J)
  Castle of Illusion - Fushigi no Oshiro Daibouken (J)
  Atomic Robo-Kid (J)

• Added ROM DB entries for the following games which are incompatible with 6-button controllers:King of Monsters
  Combat Cars
  Second Samurai
  Dungeons & Dragons - Warriors of the Eternal Sun

• Added ROM DB entries for the following games with fixed value registers:Ya Se Chuan Sho
  16 Zhang Ma Jiang
  Elf Wor
  Huan Le Tao Qi Shu: Smart Mouse
  Mighty Morphin' Power Ranges: The Fighting Edition
  Super Bubble Bobble MD
  Thunderbolt II

• Added ROM DBentries for teh following games that have bad/missing SRAM headers:Hardball III
  Might and Magic - Gates to Another World
  Might and Magic III - Isles of Terra

--0.4.1--

New Features

• Basic support for the Saturn Keyboard adapter peripheral

• You can now navigate up to a drive selection on Windows

• Added support for binding more "special" keys

Bugfixes

• It's now possible to navigate to the root directory on Unix-like systems

• Fixed a bug in movep.l

• Fixed a crash bug in the memory management code

• Fixed a bug in the header parsing code, that caused a crash when the "International Name" field was empty

• Fixed some minor graphical corruption in Sonic 2 split-screen caused by a bug in vflip combined with interlace mode

• Corrected the PC value pushed onto the stack for line A emulator and line F emulator traps

• Fixed a bug in ensure_dir_exists that would cause it to fail to create directories in some cases when mixed path separators were used

• Fixed a bug that would result in a buffer overflow when starting a game with a long title from the menu

Accuracy

• All Z80 instructions now implemented

• Z80 half-carry flag is now fully implemented

• Implemented undocumented Z80 flag bits

• R register is now incremented appropriately

• Redundant opcode prefixes are now handled properly

• Z80 core now passes ZEXALL!

Other Changes

• Added Buck Rogers to the ROM DB

• Added Wonder Boy in Monster World to the ROM DB (for real this time)

• Added Evander 'Real Deal' Holyfield's Boxing to the ROM DB

• Slightly better handling of directory read errors

• Added "Special Thanks" to About menu

• Use local app data folder for saves and config files on Windows rather than Unix-style locations

--0.4.0--

New Features

• Genesis ROM based Graphical User Interface - command line is no longer required for basic functionality

• Added support for the Mega/Sega Mouse

• Configurable low pass filter

• 68000 overclock and underclock

• Scanlines can now be controlled via the config file and defaults to off (previously was always on)

• VSync can now be specified via the config file and defaults to off (previously just used the OS/driver default)

• Fullscreen mode can now be specified via the config file in addition to the command line flag

• New 68K debugger command 'co' allows a list of commands to be run each time a breakpoint is hit

• 68K debugger now supports the 'di' command like the Z80 debugger

• New debugger command 'yt' displays YM-2612 timer info

• Added support for controller hotplug (game controllers don't need to be plugged in before starting BlastEm)

• IO devices can now be automatically configured by ROM DB entries

Bugfixes

• Fixed calculation of window start column - removes graphical glitches in Afterburner 2, Fireshark, Dungeons and Dragons: Warriors of the Eternal Sun and probably others

• Fixed the implementation of LDD and LDDR

• Fixed ABCD/SBCD - eliminates the score counter problem in Bubsy

• Fixed btst when used with immediate destination - Fixes a crash in NHL 95

• Fixed YM-2612 attack phase and sustain level

• Fixed mapping of YM-2612 key on/off bits to operators

• Fixed YM-2612 LFO AMS shift values

• Fixed YM-2612 LFO phase modulation

• Fixed mapping of registers to operators in Channel 3 special mode (for real this time)

• Fixed a small bug in YM-2612 timer reloads

• Fixed peripheral ID for 3-button pad

• Accesses by the 68K to the low 4MB of the address space, but outside of the defined ROM will no longer cause a crash

• Config files and shaders saved with Windows-style line endings will no longer fail to load

• Fixed a crash bug on Windows by properly detecting invalid destination modes for immediate variant opcodes

Accuracy/Completeness Improvements

• All 68000 instructions are now implemented

• Implemented 68000 privilege, address error and illegal instruction exceptions

• Z80 half carry flag is now implemented for the trivial cases

• Fixed timing of the Z80 IM and certain LD variants

• Implemented interrupt latency - Fixes Sesame Street: Counting Cafe

• Interrupts are know acknowleged based on what the VDP thinks its asserting rather than what the 68K actually is acking - Fixes Fatal Rewind

• Improved timing of 68000 interrupt processing

• Improved timing of Z80 busack response - Fixes a crash in Barkley: Shut Up and Jam

• Adjusted the amount of time the 68000 is blocked during DMA - gets rid of remaining part of "YOUR EMULATOR SUX" text in overdrive

• Corrected order individual words of a longword are written when the predecrement addressing mode is used as the destination of a move instruction

• Adjusted relationship between Horizontal counter and render events to better match tests/measurements

• Adjusted vertical interrupt timing to better match measurements

• Improved timing of 68K/Z80 interactions based on tests

Other Changes

• Z80 disassembler now supports a start offset parameter: -s

• Windows build now uses link time optimization like the others

• Optimized the VDP code

• Improved audio resampling

• Added Mega Man - The Wily Wars to ROM database

• Added Wonder Boy in Monster World to ROM database

--0.3.1--

New Features

• BlastEm will now open a new terminal window when starting the debugger if it's not attached to one

• Errors are displayed in a message box if no terminal is attached

• Pure SDL render path for when OpenGL 2 is unavailable (thanks Higor Eurípedes)

Bugfixes

• GDB remote debugging works again

• Fixed a name conflict that prevented vgmplay from being built on OS X

Other Changes

• Windows build now includes the disassemblers, VGM player and save state viewer

--0.3.0--

New Features

• 32-bit x86 CPUs are now supported

• BlastEm is now available for OS X and Windows

• Finished support for the Sega mapper used by Super Street Fighter 2

• Added support for EEPROM saves

• Added support for large flat-mapped ROMs (used by some homebrew ROMS)

• New 68K debugger command bt (backtrace)

• I/O devices (gamepads and other peripherals) can now be configured in blastem.cfg

• VDP Debugger views from before 0.1.0 have been restored

Bugfixes

• Partial emulation of floating bus bits for certain I/O regs (fixes Super Offroad 2)

• Fixed shadow/highlight mode

• Implemented AM and fixed LFO update speed

• Fixed negative detune values

• Corrected register to operator mapping for channel 3 special mode

• Initial stab at emulating cycles being stolen from the 68K when the Z80 accesses its bus

• Better handling of creating a savestate in "uncooperative" games/demos

• Implemented VSCROLL latching

• Fixed a bug that would corrupt the Z80's SP register in some situations

• Fixed PAL flag in VDP status register

• Fixed HV counter

• Fixed flag calculation for RRA, RRCA, RLA and RLCA

• Fixed instruction timing for RR, RRC, RL and RLC when using the IX or IY registers

• Fixed access to the I and R registers

Other Changes

• Upgraded to SDL2

• Dropped suport for the non-OpenGL render path

• Linux builds should now work on something other than the specific version of Ubuntu I happen to be using at build time

• BlastEm now syncs at least once per line by default. You can change this behavior with the max_clocks config value

--0.2.0--

New Features

• Added Turbo and Slow modes that overclock and underclock the system respectively

• Added FPS counter

• New OpenGL render backend that allows filters to be writte in GLSL

• Support 'UI' bindings on gamepad buttons and dpads

• GDB remote debugging support

• New debugger 68K debugger commands o, s and zp (see README for details)

Bugfixes

• Fixed argument handling so that the ROM filename does not need to be specified first

• Don't allow register writes to Mode 5 only regs when in Mode 4

• Fixed a bunch of VDP edge case behavior checked by Nemesis's test ROM

• Fixed operator 1 self-feedback

• Fixed handling of envelope overflow in attack phase

• Fixed handling of channel output overflow

• Adjusted FM and PSG volume to better match real hardware

• Improved YM-2612 busy flag emulation

• Properly sync hardware at end of frame when the 68K is blocked by DMA

• Approximate wait state behavior when the Z80 accesses the 68K's bus

• Implemented HV counter latch

• Implemented sprite overflow and collision flags

• Fixed the timing of several Z80 instructions

--0.1.0--

Initial Release