4004 and IC history / was Re: Vintage computer photogallery

[Roy J. Tellason]

On Saturday 13 October 2007 15:40, dwight elvey wrote:
> > > 4008/9? First I've heard of these at all.
>
>  These were but interface chips that took the pmos levels and convertered
> then to TTL levels to use with standard RAM, ROM, EPROM and I/O. 

Oh,  heck,  I'd forgotten about PMOS stuff altogether!   :-)

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