Real PDP11 model question

[Tony Duell]

> To the best of my knowledge the smallest possible PDP-11 made out of 
> real hardware would be a 4-slot dual-height backplane, with a 

There is a Q-bus box called a BA11-V, which is the same size as as the 
stand-alone TU58 tape drive (and indeed is designed to stack with said 
drive). It contains a 4-slot backplane (I assume Q18) and a little power 
supply.

It was used in the UK for something called 'York Box' which linked 
machines (mostly VAXen and PERQs) to the X25-based JANET network. IIRC 
the standard set of cards was an SBC21, MSV11 (whichever is the 64K byte 
(OK, 32K word ;-)) version, DPV11 (to link the X25 side) and DRV11 
(parallel interface to the host, you could also have a serial link using 
one of the ports on the SBC21). 

I suspect that is one of the smallest 'official' PDP11s.

-tony