Card Cage - DEC VAX 4000 300 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 - 6
The first four slots are reserved for memory modules. The fifth slot is
reserved for the central processing unit (CPU). A console module with
system controls and connectors covers these first five slots. Slots 6 through
12 are available for Q-bus option modules.
The number and type of modules installed in your system depend on your
configuration. Each Q-bus slot, even an empty one, is protected by a module
cover. Together the covers form a shield with a three-fold purpose:
• To protect external devices from electrical interference generated by the
system
• To protect the system from electrical interference generated by external
devices
1–10 VAX 4000 Model 300 Operation
Slots 5 - 1
Baud
300___________0
600___________1
1200__________2
2400__________3
4800__________4
9600__________5
19200_________6
38400_________7
Bus 0
Bus 1
Y
X
MLO-004037