The story of NEC’s FPUs is fascinating, however as is normally the case, one thing led me down this path. Whereas wanting by way of a great deal of previous scrap boards I discovered a most curious association, a board with a standard unassuming V30 processor, however proper subsequent to it was one other 40-pin chip, a chip with a HUGE die lid labeled D9008D, dated just like every little thing else, within the 1989-1991 vary curiously copyrighted 85 86 and ’87. I pulled the chip (soldered in , in fact) and it sat on my desk, for a 12 months till I determine to open the lid on it, and what did it reveal? A die that the majority actually was a floating level knowledge path. This odd chip was an FPU, and an FPU that was straight related to the V30 CPU.
Very fascinating article a few very obscure matter.