Technical data

Figure 1–2 shows the expansion ports on the VAX 4000 Model 100A.
Figure 1–2 VAX 4000 Model 100A Expansion Ports
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3
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MLO-010221
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 100A Hardware