Simulated disk drive for RT-11?

[Antonio Carlini]

Ethan Dicks wrote:

> Ahhhhgggg!  Ever seen that with a BA123?  Makes you cry... DEC
> didn't want their graphical workstations being converted to
> departmental server use, so they plugged up the extra holes in
> the backplane to prevent expansion.  For a while, one could
> order a virgin backplane from spares, but they eventually
> caught on (then they stopped hosing workstation customers so
> much ;-) 

> Fortunately, I've only ever seen it at a DECUS (DEC-owned demo
> machines); none of the machines I've worked with or personally
> owned were broken this way.

This was the (thankfully) short-lived VAXstation II/RC. The
one I saw came in a BA23, not a BA123. There were companies 
around that would (allegedly) remove the epoxy (or whatever
it was they used) and hence restore full functionality.

Antonio


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Antonio Carlini arcarlini at iee.org