A guy a scientific in France was playing with 6502 the was sorting them by speed a good number reached 7Mhz On 16/04/2018 22:09, smf wrote: > On 16/04/2018 16:54, Gerrit Heitsch wrote: >> >> The 6502 comes in different flavours: >> >> 6502 1MHz >> 6502A 2MHz >> 6502B 3MHz > > I wonder what they called the 8MHz chips? > > In there we found a hint at this story from Brian Bagnall's On The Edge: > """ > Although Commodore ran their computers at 1 MHz, Charles Winterble > claims they were able to achieve faster speeds with the 6502." We > thinned the oxides down and we intentionally did some very high speed > versions of that," says Winterble. "One thing MOS [Technology] had > going for it was a really good quality oxide. By thinning these gates > down, we were able to drive it faster and faster. Then we did > selection, in terms of our testing, to pull out the fast ones. We > actually made a couple of really hot processors for a chess tournament > for somebody. He literally water-cooled it, and he ran it at something > like 8 MHz. It was just ridiculous how fast he ran it." >Received on 2018-04-16 23:04:36
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