26 Feb
2002
26 Feb
'02
10 a.m.
Andreas Freiherr wrote:
Sounds much like some kind of "turnkey"
system that automatically
executes a ROM-based boot routine upon power-up. Depending on what ROM
that is (there are several options), you may be able to change the unit
number by moving some jumper or DIP switch on the CPU board (which
module no, in terms of Mnnnn?) or a separate board (ISTR there is
something like a bootstrap/terminator module)? - Maybe I can find out by
the halt address (173326).
Jerome Fine replies:
I seem to remember someone saying that the DSD 440 reads block zero
of drive zero on power on, then times out and jumps to location zero
to start.
Anyway, I'll go home now (currently sitting in my
office) and try to
find a procedure that will at least get you up and running again. Maybe
life gets easier if we can identify the modules that take care of your
boot.
Might help - and I also usually ask as well, but in this case probably
will not.
I think, however, RX02 bootstraps were pretty long to
type in...
Regards,
Andreas Freiherr
Vishay Semiconductor GmbH, Heilbronn, Germany
http://www.vishay.com
Try typing in the MSCP bootstrap.
The standard RX02 bootstrap uses UNIT=0, so it may need to
be modified to use UNIT=1 for DY1:, however that stuff is not
accessible to me right now. Does anyone have the release
notes for RT-11? It may be there.
Sincerely yours,
Jerome Fine