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CPU System Overview
2.3 (Optional) DSSI Daughter Board
Table 2–2 (Optional) DSSI Bus Daughter Board Components
Components
Function
DC542 (SHAC)
DSSI interface chips (2).
Bus 2 DSSI connector
Connect DSSI bus 2 here.
Bus 3 DSSI connector
Connect DSSI bus 3 here.
DSSI Bus 2 terminator sockets
Reserved for future use.
DSSI Bus 3 terminator sockets
Reserved for future use.
96-pin mother board connector
Connects to mother board.
2.4 BA440 Enclosure Components
KA681/KA691/KA692/KA694-based systems use the BA440 enclosure. A brief
description of the components that make up the BA440 enclosure follows.
For information on FRU removal and replacement procedures refer to the
BA430/BA440 Enclosure Maintenance
manual.
2.4.1 H3604 Console Module
The H3604 console module covers the five slots dedicated to the CPU and
memory modules (one slot for the KA681/KA691/KA692/KA694, and four
available slots for MS690 memory modules). Switches on the console module
allow you to configure the kernel. The console module also provides the
connectors for a serial line console device, an external DSSI bus, and the
Ethernet. See Figures 2–6 and 2–7.
CPU System Overview 2–9