User guide

Figure 1–2 shows the expansion ports on a VAX 4000 Model 106A system.
Figure 1–2 VAX 4000 Model 106A System Expansion Ports
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DSSI ports—These ports enable connection of external DSSI devices to the
system and the building of a DSSI-based VAXcluster.
Q–bus port—This is a port through which the external Q–bus expander is
connected to the computer system.
Q–bus port—This is a port through which the external Q–bus expander is
connected to the computer system.
SCSI port—This is the port to which small computer system interface
(SCSI) storage devices connect to the system unit. The SCSI terminator is
installed on this port when the unit is shipped.
1–4 VAX 4000 Model 105A/106A Hardware