Glitches and emulation errors in Mega Drive System

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RetroRalph

Type: Administrator
Posts: 695
Joined: 7/19/2009

Posted by RetroRalph at 2/24/2010 4:26:17 PM

#31

I added PSG level and FM level options to the config file, so you can set the levels how you want. No option to set them in RetroCopy's GUI yet.

RetroRalph

Type: Administrator
Posts: 695
Joined: 7/19/2009

Posted by RetroRalph at 2/24/2010 4:30:47 PM

#32

BTW Sasha, you know when you're in the 3D room the sound coming out of every system is made into mono sound, so the mono option is already there... kinda.

Sasha

Type: Member
Posts: 145
Joined: 2/19/2010

Posted by Sasha at 2/25/2010 12:42:17 AM

#33

RetroRalph wrote:

I added PSG level and FM level options to the config file, so you can set the levels how you want. No option to set them in RetroCopy's GUI yet.

Thanks my friend

now i can setup RetroCopy very close to my unknown version of Mega Drive 2

RetroRalph wrote:

BTW Sasha, you know when you're in the 3D room the sound coming out of every system is made into mono sound, so the mono option is already there... kinda.

In Sonic the Hedgehog (Mega Drive) first ring i hear second ring not. On my lovely Sega was: first and second ring i hear from both speakers, and volume of rings was average

Edited 2 times. Last edit by Sasha

RetroRalph

Type: Administrator
Posts: 695
Joined: 7/19/2009

Posted by RetroRalph at 2/25/2010 2:25:20 AM

#34

Sasha wrote:

In Sonic the Hedgehog (Mega Drive) first ring i hear second ring not. On my lovely Sega was: first and second ring i hear from both speakers, and volume of rings was average :)

Yes this bug is fixed (I believe). At least I seem to hear more rings now... could be going crazy though...

Sasha

Type: Member
Posts: 145
Joined: 2/19/2010

Posted by Sasha at 2/25/2010 9:39:02 AM

#35

These games with sample rate: 44100 and 48000 works fine.

Zombies ate my neighbors - in 192000Hz sample rate, no sound, only silent signal.
Zombie high - in 192000Hz sample rate, no sound.
Castlevania - bloodlines - in 192000Hz sample rate, no sound.
Blades of Vengeance - in 192000Hz sample rate, no music, only SFX
Columns 1 - in 192000Hz sample rate, after options, in game hangs sound.

New bugs:

Championship Pro-AM - no sound, and game hang after options.

Edited 12 times. Last edit by Sasha

RetroRalph

Type: Administrator
Posts: 695
Joined: 7/19/2009

Posted by RetroRalph at 2/25/2010 1:00:25 PM

#36

From the next version on the MegaDrive FM chip is sampled at its native speed and then using a high quality algorithm it is mixed to the host sample rate. Improves the sound quality quite a bit, this is the "SuperHQ" option I think other emulators call it.

Sasha

Type: Member
Posts: 145
Joined: 2/19/2010

Posted by Sasha at 2/25/2010 5:26:46 PM

#37

SuperHQ yes very required feature, also feature Overdrive good volume booster, and lowpass filter for emulation original 22050hz on sample rates: 44100, 48000.

all these feature required for emulation real console

Edited 1 times. Last edit by Sasha

RetroRalph

Type: Administrator
Posts: 695
Joined: 7/19/2009

Posted by RetroRalph at 2/25/2010 6:54:00 PM

#38

Sasha wrote:

Mmm well I added a global sound equalizer today, meaning there is now a high pass/low pass filter for every system and you can specify gain for the 3 sections (hi,mid,low) so you can get the perfect setting now I think. It sounds very good, much better than before! I also fixed another major sound bug today dealing with high frequency sounds in the FM chip for Megadrive, the sound is pretty much as good if not better than emulators like Kega now (to my ear anyhow).

Now I have to tie up the new filter to the YM2413 chip in SMS so it can enjoy the quality. :beer:

Sasha

Type: Member
Posts: 145
Joined: 2/19/2010

Posted by Sasha at 2/26/2010 3:20:26 AM

#39

In one day RetroCopy will be most accurate emulator in the world

Thanks, my dreams come true

Edited 4 times. Last edit by Sasha

micky

Type: Member
Posts: 45
Joined: 12/12/2009

Posted by micky at 2/26/2010 5:35:24 PM

#40

Hey Ralf, what was the cause of the gynoug's bug?

RetroRalph

Type: Administrator
Posts: 695
Joined: 7/19/2009

Posted by RetroRalph at 2/26/2010 5:43:01 PM

#41

micky wrote:

Hey Ralf, what was the cause of the gynoug's bug?

Well I know WHAT causes it, but not sure why it happens yet, if that makes sense. There is a 8bit write to VDP port to start a VDP fill (with value 0x84). Now depending upon how you write that fill (whether address^1 or address) will determine if that glitch appears. I'm not sure if the value coming from the game is wrong (0x84) or whether my implementation of the address DMA fills go to is wrong. There are a few places it could be going wrong and there is no real documentation on it, I think it's just a simple byte switch bug though that I need to double check.

Are you getting the same bug?

micky

Type: Member
Posts: 45
Joined: 12/12/2009

Posted by micky at 2/26/2010 7:18:18 PM

#42

Yes I remember now and i change the way I did DMA Fill too.
I did the same thing as genesis plus and it worked :-)
Does Mickey mania will work on 0.720 release?

Congratulation for all your work ;-)

RetroRalph

Type: Administrator
Posts: 695
Joined: 7/19/2009

Posted by RetroRalph at 2/26/2010 7:20:47 PM

#43

Not sure if it works, haven't tested it. When 720 is out try it out I guess.

Sasha

Type: Member
Posts: 145
Joined: 2/19/2010

Posted by Sasha at 3/17/2010 7:47:32 PM

#44

Retrocopy 0.720

Okay i got first bug, games run at point of save, i can't run game from start, and everytime i must restart game from menu.

Still some bugs with Sonic the Hedgehog 3, colors dots in water.

in Sonic 3D blast main menu colors too juiced.

i found megadrive approximately volume of PSG 1.100000, noise levels loud must be decreased at 3-5%

filter: cut off - causes random clicks.

sound may desync and produce random clicks and crackles.

Now i must continue test's

game 4 in 1 still can't work.

Gargoyles - not playable, character still die in black screen.

Thunder force 4 - not run at all.

Valis - not run at all.

Valis 3 - not run at all.

Squirel king - collision bug, character still fall and lost live + new graphic glitch:

Beyon of Oasis - still hang and crash Retrocopy 0.720!

Mega-lo-Mania - graphic glitch:

http://radikal.ru/F/i059.radikal.ru/1002/2d/221a4f07383d.jpg.html

Mickey Mania still have glitches at the right side:

Sonic the Hedgehog 2: still have strange scanlines:

Bonkers - graphic glitches:

http://radikal.ru/F/s006.radikal.ru/i215/1002/43/513185a7228e.jpg.html

SuperSkidmarks - menu glitch:

http://radikal.ru/F/s003.radikal.ru/i203/1002/b2/270247574897.jpg.html

Sesame Street counting cafe - not work at all.

Wolf Child - On title screen name of game with wrong draw:

http://radikal.ru/F/s13.radikal.ru/i186/1002/53/5b2e63072b1b.jpg.html

Mr Nuts - not run at all.

Super Fantasy Zone - not run at all.

Zoop - no playable.

Risky Woods - all enemy and items invisible.

Evander Holyfiel Boxing - box without boxers.

http://radikal.ru/F/s40.radikal.ru/i088/1002/ea/b5481f81050f.jpg.html

Killing game show - crash Retrocopy 0.720!

NHL 98 after main menus show black screen.

Best of the Best championship karate - in pause mode, graphic glitches:

http://radikal.ru/F/i077.radikal.ru/1002/ba/f034ca173945.jpg.html

Phantom 2040 - lines of health and ammo with bugs:

http://radikal.ru/F/s003.radikal.ru/i204/1002/09/8a831c5038ef.jpg.html

Sub-terrania - main menu in start game with glitch:

http://radikal.ru/F/s56.radikal.ru/i154/1002/98/f8cdc6ef09e0.jpg.html

Thunder force 4 - not run at all.

Bram stoker's dracula - after intro and option just hang, not playable yet.

Soul Blade (unl) - when fight begin, crash Retrocopy 0.720!

Eternal Champions - graphic bug with health lines and timer, all graphic is broken.

Edited 34 times. Last edit by Sasha

RetroRalph

Type: Administrator
Posts: 695
Joined: 7/19/2009

Posted by RetroRalph at 3/17/2010 9:28:34 PM

#45

Thanks Sasha, do you want to start a new thread for 720 so it's easier to track current issues.

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