In the engeneering drawings "Module
Utilization" are shown special
places for each module. In my drive the Modules on different places then
in the drawing.
Is the backplane a real bussystem or got i use the ports shown in drawings?
The T56 is most definitely not a bused backplane, the modules have to be
in the right slots.
I think exacltly which modules you need depeends on the controlleryou are
uisng it with. So you might need ot check that.
And DEC often drew the modual utilisation diagram looking a the _wiring_
side of the backpl;ane, not at the modules. It's a mirror image of what
you might expect.
-tony