Can anyone recommend someone to overclock one of my Gens? Its the right model/chip, so its good to go. :)
Thanks in advance!
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Can anyone recommend someone to overclock one of my Gens? Its the right model/chip, so its good to go. :)
Thanks in advance!
What is overclocking if you don't mind me asking.
I just ordered a spare TMSS HDG Genesis and all of the parts. If all goes well I'll do it for you. I'll know in a few weeks.
Making the CPU run at a faster frequency, which usually gets rid of slowdown or at least cuts it down.Quote:
Originally Posted by nieds16
Is overclocking dangerous to the CPU? I hear that it's dangerous to do it on old computer processors, was wondering if that applied here too.
With the right Genesis model 1 HDG it isn't supposed to be dangerous. As with all processors, running faster also means running hotter. I'm considering sticking a copper plate with some heat sync compound on the 68000 when I mod mine, just to be thorough. From what I have seen since people started overclocking the Genesis is that the jump from 7.67 Mhz to 10 Mhz or 12 Mhz is no different than the CPU in the NEO GEO or Sega CD running at 12.5 or 12 MHz. It is the same processor as in the Genesis with a higher clock. I haven't seen any discussion on whether these later systems used a smaller die size or were more efficient at cooling. If you look at the TMSS model Genesis 1 HDGs they were being produced at the same time as NEO GEO and Sega CD model 1.
I would love to do this too to get rid of any slowdown. But you'd have to switch it back for the Sega cd? How much to do this???
is it possible to overclock the Z80 in a genesis for use in Master System games?
I just spent $28 for all the bits and pieces and another $20 for a loose Model 1 HDG TMSS. I'll report back how long the mod takes when all of the parts get in. If we're talking about 8 hrs of soldering and testing I don't think anybody is going to like what I would charge for the mod total. I'm hoping it is less than four hours though.Quote:
Originally Posted by evilevoix
There are two switches to install, one to halt the CPU and one to switch the clock speed. You can do this with the system on or just set the speed down to play Sega CD or 32X. Agostinho is the one who is going to show me how to do it, and pointed me to the parts.
Oscillators cost about $2 or $3 each., plus $2 of the switch, it shouldn't cost you more than $10. Even considering wires...Quote:
Originally Posted by evilevoix
Yes it is, but it's not recommended because you can screw the sound on SMS games. Not to mention it would severely affect Genesis games too.Quote:
Originally Posted by AlecRob
Also the Z80 found in most Genesis is designed to work with speeds up to 4 Mhz, and if you overclock it past that range, it will work for some time, but the Z80 will eventually die. (Something common in Neo-Geos)
You'd need to change the Genesis Z80 to a Z80 capable of 6Mhz at least. Then you'd apply your own clock.
Someone needs to seriously make a site dedicated on modding the Sega Mega Drive because it's been a while since I modded mind and I am slowly starting to forget what I used and did.
and accessories too. I couldn't find a 32X S-Video guide from google, but I hear there's one here.Quote:
Originally Posted by Thunderblaze16
sheath gave the prices based on eBay since he lives in a small town and there's no local shop with electronic components there. His quotation was including shipment and more components than you listed.Quote:
Originally Posted by villahed94
SMS overclock, even in actual SMS consoles (people usually do it using the model 2), will not give you the same good results of the Genesis overclocking; not even close.Quote:
Originally Posted by villahed94
Most of the SMS games will speed up the sound as much as you speed up the processing. Many games will show glitches even around 4MHz, so 6MHz is totally nuts and out of question IMO.
I'm in my parents house, when I come back I will try to overclock the Genesis Z80 using a 60MHz oscillator since it uses the clock/15 for NTSC SMS games IIRC. I will try to use a switch to alternate between the two oscillators, so I'll be able to leave it in the stock clock while playing Genesis games.
I also remember about testing a Z80 at the university and it usually would overheat when applying underclock. It's bizarre but I remember that it heat up a lot more with underclock than with overclock.
According to some discussions over SMSPower 20% of overclock is the limit to the SMS due to RAM access timing IIRC; but using 20% you'll already get a lot of glitches AFAIK.
Workin on a helpful site: www.retrotimegames.com.Quote:
Originally Posted by Thunderblaze16
Quote:
Originally Posted by Solkia
Here is a mod I did to mine to get composite out. Really simple and easy.
http://davidaray.com/projects/consol...sis/video-mod/
Alright, I found one Radioshack here in town that has most of the components and it looks like the cost can be brought down to $22 plus tax. I'd still have to order the switches and the oscillators online to save money, and I'm supposing I won't be buying wire for a while since I have three bundles of 40-50ft already. That cost is just for the parts that would be unique to each Genesis 1 HDG TMSS mod. I'm still waiting on my switches to come in, so I won't find out if it will be worth it for me to offer this mod until I'm done with my own.
What I am picturing is that the owner of the console would order or pick up all of the components and ship them with their console. I would do the work and ship it back. I generally charge $30 for repair work that takes less than four hours, which I am hoping this will be, if it takes less than one hour I'll change that. So the total cost would be ~$20-30 (discretionary) for a Model 1 HDG TMSS, ~$22 for parts and $30 for labor plus shipping.
Agostinho and I are planning on creating a tutorial for do it yourself types as well. Thoughts?