BlastEm, autorstwa Michaela Pavon, to emulator Genesis, w zamierzeniu ma być najdokładniejszym odwzorowaniem prawdziwej maszyny (cel, który jest świętym Graalem wszystkich współczesnych udawaczy), przy jednocześnie małym zapotrzebowaniem na moc sprzętu, do celu jeszcze trochę brakuje. Jednak i w obecnej postaci emulator powinien zadowolić przeciętnego łowcę pikseli. W chwili obecnej BlastEm jest jednym z nielicznych programów, oprócz Genesis Plus GX, który może prawidłowo wyświetlić część megadema "TITAN 512C Forever" (Overdrive demo), a jedynym emulator oprócz Exodus, który przechodzi wszystkie 122 testów w "Nemesis 'VDP FIFO Testing ROM", a także prawidłowo wyświetla demo "Direct Color DMA".
BlastEm 0.6.0 31/12/18
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 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
→ NOWSZY [SEGA] BlastEm 0.6.2 27/03/19
BlastEm 0.6.2 27/03/19
New Features
- Zipped and gzipped SMD ROMs are now supported
- Gain control for overall volume and FM/PSG invidually
- Accuracy/Completeness Improvements
- Fixed timing of a few instructions in Z80 core
- Added optional emulation of YM2612 imperfections (aka "ladder effect")
- Fixed some unintentional extra precision in some FM LFO calculations
- Added a 1 sample delay in some FM operator results when used as modulators to match hardware
Bugfixes
- Fixed regression in NBA JAM TE and possibly other 32MBit Acclaim mapper titles
- Added code to handle controllers that have their d-pads mapped as buttons or axes
- Removed some problematic SDL2 game controller mappings
- Fixed crash that occurred when releasing mouse too clickly when loading a ROM
- Fixed SMD ROM support
- Fixed handling of audio contexts with more or less than 2 channels
- Fixed off-by-one error in IO device selection UI
- Fixed regression in GDB remote debugging support on Linux and OS X
Other Changes
- MegaWiFi hardware can now be enabled by a header string (still gated by config)
- Tweaked the style of checkboxes in the Nuklear UI to hopefully make the on/off state more clear
→ NOWSZY [SEGA] BlastEm 0.6.1
BlastEm 0.6.1 3/03/19
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
→ [SEGA] BlastEm 0.5.1
BlastEm 0.5.1 30/08/17
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 AnaĂŤl 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
→ [SEGA] BlastEm 0.5
BlastEm 0.5 02/06/17
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
→ [SEGA] BlastEm 0.4.1
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/Completeness Improvements
- All Z80 instructions are 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 written 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
0.1.0
- Initial Release