IBM 5100

[Tony Duell]

> You can't change the microcode of the PALM processor. That would be like
> changing the microcode of e.g. a MC68000.

It is, of course, possible to make a processor where the microcode can be 
changed by the user. Many early graphics workstations (the PERQ, many of 
the Xerox machines, etc) had microcode that was loaded from disk when the 
machine booted. WCS (Writeable Control Store) options were available for 
a few models of PDP11 to allow the user to write microcode.

-tony