IC memory is a problem. Will they know what logic
levels and supply
voltages to apply. Will data books survive? Very few of them are anything
like archival quality...
It's things like that (+5V logic supply rails, TTL thresholds) that
we'll probably forget to include, but which might be _very_ important.
Depending on how long we expect to elapse before the archaeologists get
around to digging it up, I would tend to include copies of suitable
reference books with whatever else is in the capsule. To take it to
extremes, things like the definition of a volt may be needed...
Philip.