Surely everyone knows about this fabulous site (even though I've just
discovered it).
The best collection of specific cpu links I've ever seen. Typically 100's of
links per cpu type.
Good electronics only search engine.
Home page is annoyingly ad riddled but lower levels are completely ad free.

Index page for 8051, AVR, Parallax, PIC, Scenix, Zilog, Rabbit/Zworld
Laaarge number of links for each.

    http://www.chip-sources.com/microlist/

Home page (not obvious what treasures may be dug out).

        http://www.chip-sources.com/

Large list of PIC site links (about 250 ?)

        http://www.chip-sources.com/microlist/picmicro.htm

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http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads