The 6502 was officially launched at the Wescon Trade Fair, San Francisco, September 16th 1975.

Within a few days of the launch the EDN technical department had lashed together a prototype on a breadboard and reviewed the new device. That first article is here:

https://web.archive.org/web/20160424050 ... 5_6502.pdf

I liked their initial bring-up testing - their ROM would default to outputs high and they had just one instruction in $FFFF - JMP, so come out of reset, reset vector points to $FFFF, which is JMP .... then the PC wraps to zero and the cpu picks up 2 more $FF's so JMPs back to $FFFF.

-Gordon

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Gordon Henderson.
See my Ruby 6502 and 65816 SBC projects here: https://projects.drogon.net/ruby/

Even better, this test exercises what they believed to be the critical path!