Sun Microsystems Sun Workstation 100U System Manager's Manual page 129

Sun 100/150 Installation Manual
Hardware Configuration and Expansion
Standalone Workstation
with Disk and
1/2" Tape Subsystem
1
2
P2
3
Sun-2 CPU P2
4
1 MByte Main Memory PI
5
lIe"
Tape Controller
6 XI/logic, 4,50 SMD Diek Controller
7
Monoehrome Display Controller
For a customer's own DMA devices, the correct placement order must be determined empir-
ically.
• The order in which cards are inserted into the Multibus card cage affects the ability of a
desktop workstation to maintain proper operating temperatures. Cards that require high
current also dissipate large amounts of heat and should be placed in slots in the card cage
that receive the maximum air flow. The top and bottom slots in the card cage receive the
least amount of cooling. Air flow is greatest across the center three slots in the system.
The color display controller consumes the most power, and is best placed toward the center
of the card cage. (In fact, if there are unused slots in the cage, one should be left open
directly above the color controller board.)
8.2. The 150U Card Cage
Open the door of the rackmount system card cage enclosure: the card cage is the vertically
mounted unit with fifteen slots. The following diagram shows a typical configuration of the
rack-mountable workstation. In the diagram, the notations 'P2a', 'P2b', and 'P2c' indicate
slots spanned by a single connector on the P2 bus. Cards are shown in the slots where they are
installed at the factory. Detailed explanations of the reasons for plating certain cards in specific
card slots follow this section.
Please note that this diagram illustrates our current understanding of the best board
configuration; check with Sun Microsystems or refer to the 'most recent
Configuration Guide
released by Sun if you intend to change your card cage layout in any way.
Revision H of 12 March 1984 8-5