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  JEmu2 online again  (Read 17190 times)
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Offline erikd

JGO Ninja


Medals: 16
Projects: 4
Exp: 14 years


Maximumisness


« Reply #90 - Posted 2006-01-20 21:46:21 »

JEmu2 can now play MSX games like Nemesis, Salamander etc.
However, I'm experiencing a really strange problem and I'm wondering if I'm the only one (installing a Java6 snapshot seemed to have screwed things up heavily):

The MSX works on 50FPS, but the emulator seems to run at 100Hz instead of 50Hz. This seems to happen on java 1.5.0_06 and java6, but not on
1.4; If I force the emulator to run on 1.4.2, it runs fine.
The strange thing is, even though the emulator seems to be running on 100Hz (way too fast), the FPS counter says 50.
However, on my laptop , it seems to work fine running on 1.5.0_05.
Do you notice the same thing? Has something changed with System.currentTimeMillis or Thread.sleep or something?

Offline erikd

JGO Ninja


Medals: 16
Projects: 4
Exp: 14 years


Maximumisness


« Reply #91 - Posted 2006-06-27 08:05:50 »


Offline lordus

Senior Newbie





« Reply #92 - Posted 2006-06-27 12:41:06 »

Well, if that isnt Afterburner... What a surprise   Wink
Is that 100fps for real?
Anyway, great work!
Games published by our own members! Check 'em out!
Legends of Yore - The Casual Retro Roguelike
Offline erikd

JGO Ninja


Medals: 16
Projects: 4
Exp: 14 years


Maximumisness


« Reply #93 - Posted 2006-06-27 13:30:56 »

Yes it's 100fps on my laptop (which is faster than my home desktop), and running on 1.6 server. Actually at the moment it's >120fps; at the time of the screenshot I accidently had the 2 main CPUs from AB2 overclocked (now *that's* a pleasant bug to find  Wink).
But I still have the tile planes to implement so it won't be as fast as it is now (currently only the text plane and sprite plane are emulated).

Offline erikd

JGO Ninja


Medals: 16
Projects: 4
Exp: 14 years


Maximumisness


« Reply #94 - Posted 2006-06-30 20:39:10 »

I just released a new version with support for After Burner 2.
I just got a report that it doesn't work correctly (nor do any 16 bit game now). However, it works just fine on my PC but the description I got from what's going wrong, it sounds like he's running 1.6 beta although he said he also tried 1.5. (I know because of a 1.6 client JVM bug, the 68000 core doesn't work correctly).

Could you please give it a try and report if it works for you? Thanks!

http://www.gagaplay.com/jemu2/jemu2_16.jnlp

Offline oNyx

JGO Coder


Medals: 2


pixels! :x


« Reply #95 - Posted 2006-06-30 20:56:58 »

1.5.0_06 snowbros and afterburner working fine.

弾幕 ☆ @mahonnaiseblog
Offline CaptainJester

JGO Knight


Medals: 12
Projects: 2
Exp: 14 years


Make it work; make it better.


« Reply #96 - Posted 2006-07-02 02:25:40 »

Both work fine here.  v1.5.0_06

Offline erikd

JGO Ninja


Medals: 16
Projects: 4
Exp: 14 years


Maximumisness


« Reply #97 - Posted 2006-07-23 10:57:55 »

I just updated JEmu2 again with support for Sega Y-Board hardware (Galaxy Force II, Power Drift, Rail Chase, G-LOC)

It's the most powerful hardware emulated by JEmu2 yet, running 3 68000 CPUs at once, a Z80, a YM2151 FM chip, a 16 channel PCM sound chip and 2 layers of sprite with zoom of which one layer can be completely rotated.

Because of this, the system requirements are VERY high, even though I optimized a lot already (I even did some idle loop removal). Mainly the rendering takes a huge performance hit.
I'm guessing the reason why JEmu2 is so much slower than the C based emulators is that they are not bothered by java's array bounds checking and they often use assembly based CPU emulators... (not sure, maybe there's other reasons this is slower in java).

If you try it, I would be interested to know how it runs on your hardware (please specify).

Offline CaptainJester

JGO Knight


Medals: 12
Projects: 2
Exp: 14 years


Make it work; make it better.


« Reply #98 - Posted 2006-07-31 10:54:22 »

I tried all 4 games in fullscreen mode.  They all ran at 58-59FPS(I assume you selected 60hz refresh).  The only real difficulty I had is that I don't have an analog joystick, so it was hard to control.

Windows XP SP2 full update
AMD64 3000+
512MB DDR RAM (2x256MB)
ASUS Radeon 9600PRO 128MB(AGP)
80MB 7200 RPM SATA Seagate hard drive
ASUS A8V motherboard

Offline erikd

JGO Ninja


Medals: 16
Projects: 4
Exp: 14 years


Maximumisness


« Reply #99 - Posted 2006-08-03 08:13:26 »

Thanks for the feedback.
You're right that the current keyboard implementation in the YBoard games is not ideal. The games can also be played with the mouse, though, which makes things easier in some games.

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