+For help / comments / questions visit GP32X boards at:\r
+http://www.gp32x.com/board/\r
+\r
\r
About\r
-----\r
\r
-This version of PicoDrive is another enhanced version of Dave's\r
-Megadrive / Genesis emulator for Pocket PC. The original Dave's code was\r
-heavily modified (including Cyclone core), parts of it were rewritten in\r
-asm, many features added, accuracy increased. This version is aimed at\r
-ARM-based handheld devices, so ports exist for GP2X handheld console,\r
-Symbian smartphones and PocketPC devices.\r
+This is yet another Megadrive / Genesis / Sega CD / Mega CD emulator, which\r
+was written having ARM-based handheld devices in mind (such as PDAs,\r
+smartphones and handheld consoles like GP2X of course). The critical parts\r
+(renderer, 68K and Z80 cpu interpreters) and some other random code is\r
+written in ARM asm, other code is C. The base code originates from Dave's\r
+(fdave, finalburn) PicoDrive 0.30 for Pocket PC. The Sega/Mega CD code is\r
+roughly based on Stephane Dallongeville's Gens.\r
\r
\r
How to make it run\r
------------------\r
\r
-GP2X:\r
Copy PicoDrive.gpe, code940.bin and mmuhack.o to any place in your filesystem\r
(all 3 files must be in the same directory) and run PicoDrive.gpe.\r
-Then load a ROM and enjoy!\r
+Then load a ROM and enjoy! ROMs can be in .smd or .bin format and can be zipped.\r
\r
-Symbian:\r
-Select PicoDrive from application (tools) menu and run it. That's it!\r
-\r
-All:\r
If you have any problems (game does not boot, sound is glitchy, broken graphics),\r
-make sure you enable "Accurate timing", "Emulate Z80" and then disable\r
-"Fast renderer". This way you will get the best compatibility this emulator can\r
+make sure you enable "Accurate timing", "Emulate Z80" and use "16bit accurate\r
+renderer". This way you will get the best compatibility this emulator can\r
provide.\r
\r
\r
+How to run Sega/Mega CD games\r
+-----------------------------\r
+\r
+To play any game, you need BIOS files. These files must be copied to the same\r
+directory as PicoDrive.gpe. Files can be named as follows:\r
+US: us_scd1_9210.bin us_scd2_9306.bin SegaCDBIOS9303.bin\r
+EU: eu_mcd1_9210.bin eu_mcd2_9303.bin eu_mcd2_9306.bin\r
+JP: jp_mcd1_9112.bin jp_mcd1_9111.bin\r
+these files can also be zipped.\r
+\r
+The game must be dumped to ISO format, but BIN can be used too. If you want\r
+CD music, you must use ISO+mp3 files. Audio from BIN files won't be read at\r
+all due to SD access issues. Also BIN files are usually larger, so it's better\r
+to use ISO. ISO+mp3 files can be named similarly as for other emus.\r
+Here are some examples:\r
+\r
+SonicCD.iso data track\r
+SonicCD_02.mp3 audio track 1 (CD track 2)\r
+SonicCD_03.mp3\r
+...\r
+\r
+Sonic the Hedgehog CD (US) - Track 01.iso\r
+Sonic the Hedgehog CD (US) - Track 02.mp3\r
+Sonic the Hedgehog CD (US) - Track 03.mp3\r
+...\r
+\r
+ISO files can also be zipped (but not mp3 files, as they are already\r
+compressed). Note that this can cause very long loading times, which may\r
+take up to several minutes. File naming is similar as with uncompressed ISOs.\r
+Example:\r
+\r
+SonicCD.zip data track\r
+SonicCD_02.mp3 audio track 1 (CD track 2)\r
+SonicCD_03.mp3\r
+...\r
+\r
+Notes:\r
+If the game hangs after Sega logo, you may need to enable "better sync"\r
+and/or "Scale/Rot. fx" options, found in "Sega/Mega CD options" submenu, and\r
+then reset the game.\r
+If FMV game performance is poor, try adjusting "ReadAhead buffer" to something\r
+like 2048K.\r
+\r
+\r
Configuration\r
-------------\r
\r
See config.txt file.\r
\r
\r
+Other important stuff\r
+---------------------\r
+\r
+* When you use both GP2X CPUs, keep in mind that you can't overclock as high as\r
+ when using ARM920 only. For example my GP2X when run singlecore can reach\r
+ 280MHz, but with both cores it's about 250MHz. When overclocked too much,\r
+ it may start hanging and producing random noise, or causing ARM940 crashes\r
+ ("940 crashed" message displayed).\r
+* PicoDrive is not a mp3 player, so all mp3s MUST be encoded at 44.1kHz stereo.\r
+ Badly encoded mp3s can cause various kind of problems, like noises, incorrect\r
+ playback speeds, not repeating music or even prevent game from starting.\r
+* Use lower bitrate for better performance (96 or 128kbps CBRs recommended).\r
+* Due to internal implementation mp3s must not be larger that 12MB\r
+ (12582912 bytes). Larger mp3s will not be fully loaded.\r
+* RAM timings option is good for dualcore operation (it is disabled by\r
+ default because it doesn't work on every GP2X, so enable it in advanced\r
+ options).\r
+\r
+\r
+Cheat support\r
+-------------\r
+\r
+To use GG/patch codes, you must type them into your favorite text editor, one\r
+per line. Comments may follow code after a whitespace. Only GameGenie and\r
+Genecyst patch formats are supported.\r
+Examples:\r
+\r
+Genecyst patch (this example is for Sonic):\r
+\r
+00334A:0005 Start with five lives\r
+012D24:0001 Keep invincibility until end of stage\r
+009C76:5478 each ring worth 2\r
+009C76:5678 each ring worth 3\r
+...\r
+\r
+Game Genie patch (for Sonic 2):\r
+\r
+ACLA-ATD4 Hidden palace instead of death egg in level select\r
+...\r
+\r
+Both GG and patch codes can be mixed in one file.\r
+\r
+When the file is ready, name it just like your ROM file, but with additional\r
+.pat extension, making sure that case matches.\r
+\r
+Examples:\r
+\r
+ROM: Sonic.zip\r
+PATCH FILE: Sonic.zip.pat\r
+\r
+ROM: Sonic 2.bin\r
+PATCH FILE: Sonic 2.bin.pat\r
+\r
+Put the file into your ROMs directory. Then load the .pat file as you would\r
+a ROM. Then Cheat Menu Option should appear in main menu.\r
+\r
+\r
+What is emulated?\r
+-----------------\r
+\r
+Genesis/MegaDrive:\r
+main 68k @ 7.6MHz: yes, Cyclone core\r
+z80 @ 3.6MHz: yes, DrZ80 core\r
+VDP: yes, except some quirks not used by games\r
+YM2612 FM: yes, optimized MAME core\r
+SN76489 PSG: yes, MAME core\r
+\r
+Sega/Mega CD:\r
+another 68k @ 12.5MHz: yes, Cyclone too\r
+gfx scaling/rotation chip (custom ASIC): yes\r
+PCM sound source: yes\r
+CD-ROM controller: yes (mostly)\r
+bram (internal backup RAM): yes\r
+\r
+\r
Problems / limitations\r
----------------------\r
\r
-* 32x, Sega CD, SVP are not emulated.\r
+* 32x and SVP are not emulated.\r
* Various VDP quirks (window bug, scroll size 2, etc.) are not emulated,\r
- as very few games use this.\r
+ as very few games use this (if any at all).\r
* Some games don't work or have glitches because of inaccurate timing and sync\r
between the emulated chips.\r
\r
Texas Instruments SN76489 / SN76496 programmable tone /noise generator\r
Homepage: http://www.mame.net/\r
\r
+Stephane Dallongeville\r
+Gens, MD/Mega CD/32X emulator. Most Sega CD code is based on this emu.\r
+\r
+Helix community\r
+Helix mp3 decoder\r
+\r
\r
Additional thanks\r
-----------------\r
\r
* Charles MacDonald (http://cgfm2.emuviews.com/) for old but still very useful\r
info about genesis hardware.\r
-* Stéphane Dallongeville for creating Gens and making it open-source.\r
* Steve Snake for all that he has done for Genesis emulation scene.\r
* Bart Trzynadlowski for his SSFII and 68000 docs.\r
* Haze for his research (http://haze.mameworld.info).\r
* Dzz for his ARM940 sample code.\r
* GnoStiC & Puck2099 for USB joystick support.\r
* Hermes PS2R, god_at_hell for the CpuCtrl library.\r
+* A_SN for his gamma code.\r
* craigix for supplying the GP2X hardware and making this port possible.\r
+* Alex for the icon.\r
+* ketchupgun for the skin.\r
+* All the people from gp32x boards for their support.\r
\r
Symbian:\r
* Peter van Sebille for his various open-source Symbian projects to learn from.\r
\r
Changelog\r
---------\r
+1.34\r
+ + Some new optimizations in memory handlers, and for shadow/hilight mode.\r
+ + Added some hacks to make more games work without enabling "accurate timing".\r
+ * Adjusted timing for "accurate timing" mode and added preliminary VDP FIFO\r
+ emulation. Fixes Double Dragon 2, tearing in Chaos Engine and some other games.\r
+ * Fixed a few games not having sound at startup.\r
+ * Updated serial EEPROM code to support more games. Thanks to EkeEke for\r
+ providing info about additional EEPROM types and game mappers.\r
+ * The above change fixed hang of NBA Jam.\r
+\r
+1.33\r
+ * Updated Cyclone core to 0.0088.\r
+ + Added A r k's usbjoy fix.\r
+ + Added "perfect vsync" option, which adjusts GP2X LCD refresh rate and syncs\r
+ emulation to it to eliminate tearing and ensure smoothest scrolling possible.\r
+ + Added an option to use A_SN's camma curve for gamma correction (improves dark\r
+ and bright color display for mk2s).\r
+ * Sometimes stray sounds were played after loading a savestate. Fixed.\r
+ * Fixed a problem where >6MB mp3s were corrupted in memory (sound glitches in\r
+ Snatcher).\r
+ * PD no longer overwrites video player code in memory, video player now can be\r
+ used after exiting PicoDrive.\r
+ * Fixed a bug which was causing Sonic 3 code to deadlock in some rare conditions\r
+ if "accurate timing" was not enabled.\r
+ * Fixed support for large hacked ROMs like "Ultimate Mortal Kombat Trilogy".\r
+ Upto 10MB hacked ROMs are supported now.\r
+ + Config profiles added (press left/right when saving config).\r
+ * Changed key configuration behavior to the one from gpfce (should be more\r
+ intuitive).\r
+ + Added some skinning capabilities to the menu system with default skin by\r
+ ketchupgun. Delete skin directory if you want old behaviour.\r
+ * Some other little tweaks I forgot about.\r
+\r
+1.32\r
+ + Added some new scaling options.\r
+ + Added ability to reload CD images while game is running (needed for games\r
+ with multiple CDs, like Night Trap).\r
+ + Added RAM cart emulation.\r
+ * Fixed DMA timing emulation (caused lock-ups for some genesis games).\r
+ * Idle loop detection was picking up wrong code and causing glitches, fixed.\r
+ * The ym2612 code on 940 now can handle multiple updates per frame\r
+ (fixes Thunger Force III "seiren" level drums for example).\r
+ * Memory handlers were ignoring some writes to PSG chip, fixed (missing sounds in\r
+ Popful Mail, Silpheed).\r
+ * Improved z80 timing, should fix some sound problems.\r
+ * Fixed a bug with sram register (fixes Phantasy Star 4).\r
+ * ROM loader was incorrectly identifying some ROMs as invalid. Fixed.\r
+ * Added code for PRG ram write protection register (Dungeon Explorer).\r
+ * The memory mode register change in 1.31 was unsafe and caused some glitches in\r
+ AH-3 Thunderstrike. Fixed.\r
+ * Fixed a file descriptor leak.\r
+ * Updated documentation, added Gmenu2x manual.\r
+\r
+1.31\r
+ * Changed the way memory mode register is read (fixes Lunar 2, broken in 1.30).\r
+ * Fixed TAS opcode on sub-68k side (fixes Batman games).\r
+ * File browser now filters out mp3s, saves and some other files, which are not ROMS.\r
+\r
+1.30\r
+ + ISO files now can be zipped. Note that this causes VERY long loading times.\r
+ + Added data pre-buffering support, this allows to reduce frequency of short pauses\r
+ in FMV games (caused by SD access), but makes those pauses longer.\r
+ * Fixed PCM DMA transfers (intro FMV in Popful Mail).\r
+ + Properly implemented "decode" data transformation (Jaguar XJ220).\r
+ * Integrated "better sync" code into cyclone code, what made this mode much faster.\r
+ * Fixed a bug related to game specific config saving.\r
+ * Frameskipper was skipping sound processing, what caused some audio desyncs. Fixed.\r
+ * Fixed reset not working for some games.\r
+ + New assembly optimized memory handlers for CD (gives at least a few fps).\r
+ Also re-enabled all optimizations from 0.964 release.\r
+ + New idle-loop detection code for sub-68k. Speeds up at least a few games.\r
+\r
+1.201\r
+ + Added basic cheat support (GameGenie and Genecyst patches).\r
+\r
+1.20\r
+ * Fixed a long-standing problem in audio mixing code which caused slight distortions\r
+ at lower sample rates.\r
+ * Changed the way 920 and 940 communicates (again), should be more reliable and give\r
+ slight performance increase.\r
+ * Some optimizations in audio mixing code.\r
+ * Some menu changes (background added, smaller font in ROM browser, savestate loader\r
+ now can select slots).\r
+ + 1M mode DMA transfers implemented (used by FMV games like Night Trap and Sewer Shark).\r
+ + Games now can run code from WORD RAM in 1M mode (fixes Adventures of Willy Beamish).\r
+ + "Cell arrange" address mapping is now emulated (Heart of the alien).\r
+ + "Color numeric operation" is now emulated (text in Lunar 2, Silpheed intro graphics).\r
+ + "Better sync" option added (prevents some games from hanging).\r
+\r
+1.14\r
+ + Region autodetection now can be customized.\r
+ * When CDDA music tracks changed, old buffer contents were incorrectly played. Fixed.\r
+ * BRAM is now automatically formatted (no need to enter BIOS menu and format any more).\r
+ * Games now can be reset, CDDA music no longer breaks after loading another ISO.\r
+ * Fixed a race condition between 920 and 940 which sometimes caused CDDA music not to play.\r
+ + Savestates implemented for Sega/Mega CD.\r
+ + PCM sound added.\r
+ * Some mixer code rewritten in asm. 22kHz and 11kHz sound rates are now supported in\r
+ Mega CD mode (but mp3s must still be 44kHz stereo).\r
+ + Timer emulation added.\r
+ * CDC DMA tansfers fixed. Snatcher and probably some more games now boot.\r
+ * 2M word RAM -> VDP transfers fixed, no more corruption in Ecco and some other games.\r
+\r
+1.10\r
+ + GP2X: Added experimental Sega CD support.\r
+ + GP2X: Added partial gmv movie playback support.\r
+\r
0.964\r
* GP2X: Fixed a sound buffer underflow issue on lower sample rate modes, which was\r
happening for NTSC games and causing sound clicks.\r
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) \r
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE \r
POSSIBILITY OF SUCH DAMAGE. \r
+\r
+SEGA/Genesis/MegaDrive/SEGA-CD/Mega-CD/32X are trademarks of\r
+Sega Enterprises Ltd.\r
+\r
notaz.gp2x.de / picodrive.git / blobdiff