Technical data

4
Hardware Options
This chapter describes the hardware options of the VAX 4000 Model 100A. It
also describes how to connect the external hardware options to the system. It
includes information on the following topics:
• Internal hardware options
• External hardware options
• Connecting a SCSI expansion box
• Connecting peripherals
4.1 Internal Hardware Options
The system supports the following internal hardware options:
• MS44L-BC 16MB set (4XMS44L-AA) and MS44-DC 64MB set (4XMS44-
CA) memory modules—The Model 100A system does not have any memory
on the system board. It uses only MS44L-BC and MS44-DC memory
module bundles. You can increase the memory capacity of the Model 100A
system up to a maximum of 128MB in 16MB or 64MB increments using a
maximum of two memory sets.
• Synchronous communications options—The system supports the DSW42-
AA synchronous communications option. This communications option
provides two synchronous communications ports and allows you to connect
the system to a peripheral that uses an EIA-232 (V.24) 25-pin connector.
You can use other interface standards with this option if you order different
cables. Table 4–1 lists each interface standard and the part number of the
corresponding cable.
Hardware Options 4–1