Hey, Neil!

 > The embedded systems with which I worked had no mass storage devices.
 > Programs were kept in EEPROMS and data was held in static memory
 > (which was _really_ scarce).

Strangely enough, that doesn't preclude it, Neil. It's ancient history now,
but it was possible to fit loads of EPROMS and bank switch them. However on
the whole what you say is generally true.

 > There resources required for storing the overlay manager weren't there.

    In bank switched systems, it's in bank 0. So is the scratchpad RAM.
However - this *is* ancient history. There should be no need for it
nowadays. Storage is now cheap and plentiful.

Best wishes,
Bill.

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