BlastEm a pour objectif d’être un émulateur Genesis extrêmement précis tout en fonctionnant sur du matériel relativement modeste en utilisant des techniques de pointe.
Les changements sont les suivants:
*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 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 Rangers: The Fighting Edition
Super Bubble Bobble MD
Thunderbolt II
– Added ROM DB entries for the following games that have bad/missing SRAM headers:
Hardball III
Might and Magic – Gates to Another World
Might and Magic III – Isles of Terra
