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jEnesisDS 0.6
2008/27/01
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1. About jEnesisDS |
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"jEnesisDS" is a Sega MegaDrive/Genesis Emulator for the Nintendo DS.
It started as a port of my Java Genesis/32X emulator jEnesis. By now, the code has been
completely rewritten and many parts are written in ARM assembler.
You have to play a bit with the settings to make some games boot or work better.
Some games work faster with "H-INT emulation", others need it to work at all.
Very few games will just boot, if checksum autofixing is disabled (Dynamite Heady, Thunder Force IV).
Changelog:
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v0.6 *
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- Custom Z80 ASM core implemented.
- Custom YM2612 and PSG emulation, running on the ARM7. So there is sound now ;)
- Many parts rewritten. Speed without Z80 core should be quite a bit faster for most games.
- Idle-loop detection completely rewritten. Shouldn't break any games anymore. Therefore the option to
disable it was taken out.
- Some changes to HW renderer. Some glitches should be gone, others were probably introduced. Will be
rewritten for the next version.
- Tweaked H-Int auto detection, so less games should need the "ON" option to boot now.
- Mode-Button added (L+R+Start)
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v0.5 *
********
- Implemented save-states (touch slot icons to load/save)
- Extended SRAM compatibility. Story of Thor and Phantasy Star IV should work now.
- Extended "force update" of HW renderer. Fixes Sonic3 intro, Sonic Bonus stage and probably others.
- Fixed sprites showing garbage if more than 64 sprites were displayed.
(Comix Zone, Outrun, Sonic, well most games i guess).
- Partial rewrite of sprite handling in the HW renderer.
Less slowdowns when a lot of sprites are displayed.
- Implemented better VSync. Fixes temporary speedups after slowdowns.
- Implemented vertical scaling option into HW renderer (horizontal is NOT possible, dont ask!).
Aspect ratio will be incorrect, but makes games more enjoyable (at least in my opinion).
- Implemented screen positioning in HW renderer (touch screen to pause, then use [D-Pad] to scroll.
Push [A] for faster scrolling)
- Rewrote DS interrupt system for HW renderer. Probably less slowdowns, surely safer.
- Added "Fake Z80" option. The faking code can mess up some games (Ghouls n' Ghosts, Aladdin,
Cool Spot 2, and others), so it can be turned off now.
Interestingly enough, if it is turned off, real Z80 emulation will be executed, BUT just under
certain circumstances, to keep games working and not to slow things down.
As with other options, some games might depend on a certain setting to boot
(Gaiares just boots when this option is set to "off").
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v0.4a * Updated Release
********
- Recompiled with current cpu core. v0.4 was "accidentially" compiled with an older version.
This should raise compatibility quite a bit.
- Separated HW and SW renderer versions.
- Activated "Force Update" Option in the HW renderer version. If enabled, the chances of tile
corruptions are minimized - it can lead to massive slowdowns though, if a game updates more than
1024 unique tiles per frame (Turrican intro, Comix Zone intro).
You can also temporarily change this option for a one-time update, if the tiles are corrupted
(i.e Viewpoint).
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v0.4 * Initial Preview Release
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- Custom ARM asm Motorola68000 CPU core
- Hardware and Software renderer (this release defaults to the HW renderer and the SW
renderer can not yet been choosen through the settings.
- VDP emulation with all DMA modes
- Horizontal & Vertical Interrupts
- Support for PAL/NTSC and all country codes (all games will run at 60Hz though)
- .smd, .bin & .gen support
- partial SRAM save/load support (doesnt work for all games yet)
- Line based renderer
- Scroll Layers A+B & Window rendering with priorities (horizontal Windows arenot emulated in the
HW renderer yet)
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2. How to use |
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If you downloaded this, you probably know how to use an emulator. It
should be self-explanatory ;)
jEnesisDS uses DLDI for accessing your cards filesystem, so you have to patch the file
with the appropriate DLDI patch found here:
http://chishm.drunkencoders.com/DLDI/
There is no way to edit the key settings yet, so here is the layout:
PAD1:
A= [Y]
B=
C= [A]
X= [X]
Y= [L]
Z= [R]
START= [START]
MODE = [START+L+R]
L,R,D,U= directional keys
[SELECT]: Enter File Browser (Also accessible by the cartridge icon)
Touch the Joypad icon to enter Setting ingame.
Touch save-slot icons to load/save states (2 slots available)
Touch screen to pause. While in pause mode, use the D-Pad to for
screen positioning in the HW renderer version.
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3. Thanks go to |
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-Exophase, St閜hane Dallongeville ,Charles McDonald, SiLeNt_Ni
-Anyone else who supported this project in one or another way
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4. Licence and Acknowledgement |
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jEnesisDS is a released under no special kind of licence, it is completely free, the sources
are closed and it is provided as is, without any kind of guarantees or support.
Use it at your own risk.
jEnesisDS is developed by me, Stephan Dittrich and i hold the copyright to it. Dont modify it,
dont sell it, dont do anything illegal with it, or distribute it without this document.
If you want to host jEnesisDS on your website, do so, if you provide the original archive including
this document, as found on my website www.workingdesign.de.
jEnesisDS was entirely written by me, without using any existing sources
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5. Contact |
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If you want to leave a comment about jEnesisDS, do it here:
dittiman@gmx.net
or visit my website: www.workingdesign.de
Anyway, hope you enjoy it...
本次最大的更新就是支持了声音.这个模拟器从出来到现在我一直很关注,原因是它对ROM支持度相当高,也就是说只要能运行基本能达满帧,支持约80%的ROM.
开始担心声音会对速度造成影响,现在看来是杞人忧天了.该版本声音和速度无限接近完美.
先说速度,速度还是和前几个版本一样保持在60fps左右,甚至感觉比PC上的MD模拟器还流畅.
其次是声音,这是该模拟器第一次对声音的支持,没想到效果远超过预期,可能因为我玩过MD实机,所以可以听出声音中的其中一个通道模拟度不是很好(即还原度不高),其余通道模拟的还是很到位的.但没玩过MD或是玩的不多的可能听不出来.另外,MD不是只支持单声道吗?但这个模拟器居然是立体声的,倒...作者真强大.
随便弄了3个ROM测试了下.
梦幻模拟战2
画面:近乎完美(分辨率问题不考虑)
移动范围图层无显示,战斗闪屏(将H-INT Emulation设置为off即可解决)
速度:完美
真的很流畅
声音:完美度90%
已经说了,某通道还原度失真.但不影响总体声音表现.
大航海时代
画面:完美(只玩了个开头,后面不清楚)
速度:完美(同上)
声音:还原度还不错,完美度95%
新创世纪
画面:完美(主角的小盾一闪一闪,不影响游戏)
速度:完美(99.99%吧)
声音:声音出乎意料的完美,可能是没有用到那个有问题的通道吧.
另外,推荐下该游戏,在我眼里比塞尔达更好玩,特别是音乐,太棒了.
附件为打过R4 DLDI的软件,不是R4的需要重新打DLDI补丁. |
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