C-1
APPENDIX
C
Functional Description
This appendix describes the inner workings of the Sun Ultra 45 or Ultra 25
workstation. Topic include:
■ Section C.1, “Hardware Architecture” on page C-1
■ Section C.2, “Motherboard” on page C-5
■ Section C.3, “Serial Ports” on page C-8
C.1 Hardware Architecture
This section provides an overview of the Sun Ultra 45 or Ultra 25 workstation.
C.1.1 Motherboard Layout Diagram
FIGURE C-1 shows the layout of the Sun Ultra 45 motherboard, including connector
and jumper locations.
Note – The Sun Ultra 25 workstation motherboard has one CPU (CPU0) and one
bank of four DIMM slots. Other aspects of the Sun Ultra 25 are the same as the Sun
Ultra 45 workstation.
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