LSI-11/2 CPU with tracks cut?

[Sebastian Brückner]

Christian Corti schrieb:
> According to the "microcomputer processor handbook" (edition 1979-80) 
> the backplane signal names for BC1 to BH1 are called SSPARE4 to SSPARE8 
> (special spare) and are *not* bussed.

Yes but that apparently is only true for the very first machines using 
QBUS i.e. with the LSI-11 CPU. The LSI-11 manual contains exactly the 
same information.

> The KD11-HA signal names on these 
> pins are:
> BC1  SCLK3H
> BD1  SWMIB18H
> BE1  SWMIB19H
> BF1  SWMIB20H
> BH1  SWMIB21H

Any idea how I can find out what those signals actually do?

Sebastian