Sbus Card; Figure B-1 System Board Block Diagram; Figure C-6 Scsi Connector - Sun Microsystems SPARCstation 20 Service Manual

SCSI connector
MBus
MBus 1
MBus 0
MSBI
Floppy
85C30
82077
FIGURE B-1

SBus Card

Each system board supports one to four SBus cards. A wide variety of I/O options
can be used with SBus cards, such as graphic displays, Ethernet, printers, and serial/
parallel controllers.
SMC
COT 416
Video 0
Video 1
SBus 1
SBus 0
SBus
85C30
System Board Block Diagram
DSIMM 0
Memory bus
SEC
TOD
EEPROM
SCSI connector
Appendix B
SBus 3
SBus 2
DBRI
MACIO
Aux video
Audio on
board
Functional Description 197