From looking around the 11/730 boards (I am still
looking for the
printset..) there doesn't appear to be any micrcode ROMs in
the machine.
There's an area of RAM which I assume is a writeable control store. I
think all the microcode is loaded from the TU58.
The printset I scanned is here:
http://www.pdp11.nl/Documentation/11730z1.pdf
(or at least, it will be back, once the site comes
back on air).
I'm pretty certain that the 11/730 is entirely
soft. I remember reading an article in one of
the DEC Technical Journals where they described
how they used the VAX-11/730 as a test bed for
the MicroVAX II subset instruction emulation
code.
Antonio
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Antonio Carlini arcarlini(a)iee.org