I bet these are mostly fakes. I just checked a few on ebay and they all scream fake due to the printing that is identical to other fake chips, and the fact that the model number does not match with what a 16 MHz version should say. Finding (or rather: getting) a real one might require some luck.why? ebay is full of 16MHz V20s for 2-3$ a piece
I bet these are mostly fakes. I just checked a few on ebay and they all scream fake due to the printing that is identical to other fake chips, and the fact that the model number does not match with what a 16 MHz version should say. Finding (or rather: getting) a real one might require some luck.
Work fine in 12MHz Juko XT board too, and running very cool. Looking at the pins, it looks like they are genuine old parts de-soldered from some old PCBs. May be some Fax machine or photo-copier, who knows.FWIW, I bought a tube of these cheap-ies after successfully upgrading two Tandy machines with them. They may well be "fake", IE, rebadged, but they at least seem to actually be V20s. Now what clock speed they're actually rated for is anyone's guess, all I know is they work up to 7.16mhz.
The V20 is not 80286 compatible. It has some 80286 instructions like PUSHA and POPA but here the 80186 served as base. No idea how compatible it is with the 80186.
Not an expert by any means, but part of my in-laws' estate that came to my wife is a for real Pachinko machine that was "liberated" from an officers' club someplace or other. The "restoration" mostly involved removing accumulated rodent and bug debris from the tracks the balls flew around on. But the only "electronic" parts were some sockets for 12v flashlight style bulbs and connective wiring that attached them to either a battery or a transformer that was long gone.Yeah, they're definitely used, the pins have that suspicious tinned look to them, but at least they are mostly what they say they are. Could be from any number of things, I like to think mine are from old Pachinko arcade games.
Short version, all mechanical with the exception of those lights & not the first IC to be seen V20 or otherwise.