> > 2102 1k bit x1 static RAM, N-MOS, geometry size unknown, introduced > > by intel in 1970s. > I remember those. =A0I once stacked 8 DIP on top of each other such that = all > the pins were paralleled except the data lines. =A0I had bent the data pi= ns > out so that they didn't stack, and wire wrapped a separate wire to each o= ne. > Voila, 1K byte-wide RAM. A friend, who had more money than I did at the tike, stacked 64 of them in a physical 8 x 8 array as above to make a massive 8 kByte RAM. Wow! 8 kB in one module!!!. Dubbed "Great Wall of China" as I recall. Probably long gone. It would make a nice museum piece today Gavin ... ? Russell --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .