Card Cage; Mass Storage Shelf - DEC 4000 Model 200 Operation Manual

1.1.1.2 Card Cage

The modules in your system are mounted in a 12-slot card cage under the
mass storage shelf, as shown in Figure 1–7.
Figure 1–7: Card Cage
Slots 12 - 1
MLO-005503
The first slot is reserved for the central processing unit (CPU). Up to
four MS650 memory modules may follow the CPU. The CPU and the first
memory module (slots 1 and 2) are covered by a dual-width CPU cover panel
with system controls and connectors. The remaining slots are available for
Q-bus option modules.
1–10 VAX 4000 Model 200 (BA430) Operation