Technical information

Chapter 3
System Expansion
This chapter provides guidelines on how to expand your VAX 4000 Model
300 system.
3.1 Planning Your System Expansion
You must consider the following when you decide to expand your system:
• Can your system accommodate additional supported options?
You determine this by filling in the worksheet (Figure 3-1) with the
options currently installed in your system and those you wish to add.
• If your existing system cannot accommodate a particular set of
supported options, you might wish to add the R400X expander to enable
support for up to seven RF-series ISAs.
This chapter does not describe how to configure new options or how to install
them in your system. Configuring an option involves assigning a control and
status register (CSR) address and an interrupt vector. This is usually done
by means of switches or jumpers on the options themselves. Digital service
representatives configure the options when they install them. Your Digital
service
representative also determines the proper placement of options
within your system, according to specific guidelines.
3.2 Completing the Configuration Worksheet
To determine. what options you can add to your system, you must list the
options currently installed and their power requirements on the VAX 4000
Model 300 Configuration Worksheet, Figure 3-I.
The worksheet is for the BA440 enclosure. All backplane slots and mass
storage devices are powered by the H7874 power supply.
System Expansion 3-1