Dual Bus 4-Slot Hsc Expansion I/O Card (K570/K580 Only) - HP 3000 9x9KS Service Manual

Dual Bus 4-Slot HSC Expansion I/O Card (K570/K580 only)

K5x0 servers support up to two HSC Expansion cards. The primary HSC Expansion Card can be either a 2
or 4 slot HSC Expansion card. The primary HSC Expansion I/O card will only fit in the HSC Expansion I/
O slot. Both the slot and the card are color-coded with an orange stripe.
The second HSC Expansion I/O card is referred to as the Dual Bus 4-slot HSC Expansion I/O card. As the
name implies, this card is only available in a 4-slot configuration. The Dual Bus 4-slot HSC Expansion I/O
card is only supported on K5x0 servers. It will only fit in the dual purpose slot. The dual purpose slot is color
coded burgundy and violet to represent that either processor cards (violet stripe) or the Dual Bus 4-slot HSC
Expansion I/O card (burgundy stripe) can be installed in that slot.
The Dual Bus 4-slot Expansion I/O card (see Figure 7-20)has a
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(2) one socketed crystal (Y1), and (3) an empty socket for a second crystal (XY2)

Figure 7-20 Dual Bus 4-slot HSC Expansion I/O PCB
S1 and XY2 were added to allow the two HSC busses (2 and 3) to run at different speeds. This is a feature
that is not yet implemented as of this publication date. Currently, the ONLY valid settings for S1 are all
switches in the OFF position (see Figure 7-21).
Caution
Do not set switches 2 and 3 ON simultaneously as hardware damage may result to the card.
Removal and Replacement 7-25