That's a V4b. The V4a doesn't have the dip switches. The V4bs' are the rarest and most desirable of all the versions, as they are the easiest to hack and until the V5 bios was developed to deal with the "new" sound chip, they were snapped up quickly. Even the V5's out now with the easily obtained sound enabling bios chip are not as desirable as they sometimes have problems dealing with new memory chips. Sorry, but I don't have an un-hacked V4b. Good luck in finding one.
Well, if it looks like I won't get a V4b anytime soon, I will try my hand at a V4a for $110 plus shipping. I see from his posts that Badflash has a way to set up a V3 for a 2.0 volt core. If this works for a V4a, then I'm set. I'm not afraid of soldering--I have set up two V5's with all the Badflash power supply and bus and cpu multiplier mods.
The V3's and V4a's voltage is easily changed with adding a resistor at R343 or the like. A V1 and V2 are only slightly more difficult. It isn't really more difficult, it's just a lesser known mod, one not referred to in the Moderated Technical Section. If you are only after the Yamaha chip and don't care about whether you have a Rise6 or Winchip in the machine then you can find one for a lot less on eBay. I can email you the directions for the V1 voltage mod if you like. If I can find the old tread where it is described I will link it here.
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