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Config11 is a program for calculating the floating address space layout of
a PDP-11 or VAX.

Config11 is an interactive program.  When started, it repeatedly asks for
the names of controllers and the numbers of instances:

> config11
Name:	UDA50
Number:	2
Name:	DZ11
Number:	2
Name:

To end input, simply type ENTER to the NAME: prompt.  Config11 will then
print out the complete floating address table for the known Unibus and
Qbus devices.