MSV11-QB woes

[Tore S Bekkedal]

Hey, I have two MSV11-QBs here, each 2 meg parity QBUS memories.

I'd like to put both in the same system, creating a 4 meg PDP-11, but I
can't find the DIP switch settings for them.

The PCB in the PDF has the DIP switches placed differently on the board,
and the settings I try don't seem to work, I'm throwing memory errors,
and the boards appear in the wrong places.

the PCB revision is 5017547-01-D1-P2 while the PDF depicts a C1. I don't
know if that's the problem, but the boards do look different.

What I previously had was 
  __Q22_______   _______Q/CD______
/             \ /                 \
|Emul|DHV-|DHV-|DELQ|Gran|MSV-|PDP-|
|ex S|11  |11  |A   |t co| 11 |11/ |
|CSI |    |    |    |ntin|    |83  |
|    |    |    |    |uity| QB |    |
|    |    |    |    |    | 0- |CPU |
|----|    |    |----|----| 2m |    |
|    |    |    |    |    |    |    |
|    |    |    |    |    |    |    |
|    |    |    |    |    |    |    |
|    |    |    |    |    |    |    |
|    |    |    |    |    |    |    |
  7    6    5    4    3    2    1
What I've changed it to is:

  _______Q22_______   _______Q/CD______
/                  \ /                 \
|    |TK50|DHV-|DHV-|DELQ|MSV-|MSV-|PDP-|
|    |Cont|11  |11  |A   |11  | 11 |11/ |
|    |    |    |    |    |    |    |83  |
|    |    |    |    |    | QB | QB |    |
|    |    |    |    |    | 2- | 0- |CPU |
|----|----|    |    |----| 4m | 2m |    |
|RQDX|Emul|    |    |    |    |    |    |
|  3 |ex S|    |    |    |    |    |    |
|    |CSI |    |    |    |    |    |    |
|    |    |    |    |    |    |    |    |
|    |    |    |    |    |    |    |    |
  8    7    6    5    4    3    2    1

With both memory boards in, the CPU diag ROM reports that I have small
ROMs placed around the memory space and one RAM board somewhere in space
of some strange size. I assume that's because the DIP switch settings
are wrong.

Anyone have the docs? Or know what the DIP switch settings are for
setting them to 0-2M and 2-4M?

Thanks very much in advance for your help!
-toresbe