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 SEGA Genesis 2 model PC BD MD2 VA0 USA 50/60HZ switch sound problem

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retroborg

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PostSubject: SEGA Genesis 2 model PC BD MD2 VA0 USA 50/60HZ switch sound problem    Sat Mar 08, 2014 8:34 am

Good day,

I decided to mod my SEGA Genesis 2 model PC BD MD2 VA0 USA my adding a region and a 50/60HZ switch. I used this guide and both switches seem to work.

http://djoen.dommel.be/djoen.html

How ever, I noticed some weird behavior, which I had not encountered before with all the other EURO PAL Mega Drive II which I have modded so far.

Any game (JPN/EUR/USA) I try to boot from the start at 50HZ, the music is either messed up, or the sound effects are missing. If I switch it back to 60HZ on the fly the music gets fixed, but in some games I have to reboot the console and restart it at 60HZ.

This even occurs in various European PAL region locked games like Mega Swiv, Mega Turrican, Ranger X & Alien Soldier. If I switch it to 60HZ right after it passes the region lock, they all work fine at 60HZ, but if I revert them back to 50HZ, the music gets messed up.


The only games which I was able to run natively at 50HZ right from the start and switched between 50/60HZ on the fly without any problems, were Bare Knuckle 1 (JPN), Turrican 1 (USA), Bio Hazard Battle (EURO) & Battle Squadron (USA). While Strider (USA) & Sensible Soccer (EURO), even though they start off fine at 50HZ, if I switch it to 60HZ during play, the screen gets garbled up, but if I switch it from 60HZ to 50HZ on the fly during play they’re fine.


Is this is a known issue with modded Genesis 2 consoles @50HZ, or have I done something horribly wrong? Is there any way to fix this and make it more compatible & universal like the EURO PAL modded Mega Drive II?


Thanks in advance
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Drakon
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PostSubject: Re: SEGA Genesis 2 model PC BD MD2 VA0 USA 50/60HZ switch sound problem    Sat Mar 15, 2014 9:46 am

I don't know, I never play games in 50 hz. Very nice avatar.
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retroborg

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PostSubject: Re: SEGA Genesis 2 model PC BD MD2 VA0 USA 50/60HZ switch sound problem    Mon Mar 24, 2014 6:13 pm

So, apparently it a problem with The main IC which can't display 50HZ properly. Nothing can be done about it, so I'll just pack it up.

SEGA
315-5487-01
FC1004
9314 ZFDE
Z53


Thanks for the avatar, its from Granada. The Japanese Mega Drive games definitely had some of the coolest covrs and flyers ever. hands down.

By the way, what game is that wolf character in your avatar from?
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Drakon
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PostSubject: Re: SEGA Genesis 2 model PC BD MD2 VA0 USA 50/60HZ switch sound problem    Tue Jul 08, 2014 7:14 pm

sorry for not replying, my avatar is from starfox 2 for the snes.
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MaxWar

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PostSubject: Re: SEGA Genesis 2 model PC BD MD2 VA0 USA 50/60HZ switch sound problem    Thu Jul 10, 2014 11:08 pm

I think this is the same issue we had with the VA7 a while ago. Switching to 50hz produces similar symptoms on all VA7. There is currently no fix.
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PostSubject: Re: SEGA Genesis 2 model PC BD MD2 VA0 USA 50/60HZ switch sound problem    Fri Jul 11, 2014 9:08 am

MaxWar wrote:
I think this is the same issue we had with the VA7 a while ago. Switching to 50hz produces similar symptoms on all VA7. There is currently no fix.

Why would you want to play a game in 50 hz? Are there some games that refuse to play in ntsc?
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MaxWar

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PostSubject: Re: SEGA Genesis 2 model PC BD MD2 VA0 USA 50/60HZ switch sound problem    Fri Jul 11, 2014 10:13 am

Maybe a handful, there used to be a list somewhere but iirc there is nothing to really make you want a 50hz mod. I tried the mod more as of a curiosity and because I was intrigued that it did not work on the VA7.
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PostSubject: Re: SEGA Genesis 2 model PC BD MD2 VA0 USA 50/60HZ switch sound problem    Sat Jul 12, 2014 9:20 am

MaxWar wrote:
Maybe a handful, there used to be a list somewhere but iirc there is nothing to really make you want a 50hz mod. I tried the mod more as of a curiosity and because I was intrigued that it did not work on the VA7.

That's the best reason to do any mod.  That's why I love having you here you do modding for the sake of the hobby which shows you really enjoy the hobby.
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