SCSI Bus Termination 2-23
Figure 2.1 7 shows an ex ample of how te rmination is d etermined for th is
SCSI bus configuration. If you connect the SYM22801 in the middle of
the bus, you will incur improper termination since the switches are not
assigned on that bus correctly.
Figure 2.17 Internal and Internal SCSI Device Termination
If you have an internal connection to another SYM22801 host adapter,
or any connection to a device that uses the same sensing method for
automatic termination as your SYM22801, you must properly set the
termination override switches U1 or U2 (see Figure 2.1).
2.3.4.1 Channel Switches
When connecting another SYM22801, you must turn on the switch for
the connector used on one or both of the boards. Please refer to
Figure 2.18, and the n ext two paragraphs, to dete rmine the correct
switch setting.
Last Devices
on Chain -
Termination
Enabled
Does Not
End Chain -
Term inatio n
Disabled
Host Adapter
Automatically
Terminated