Digital Equipment SA100 Installations- und Benutzerhandbuch - Seite 14
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Seite drucken3–2 Configuration
Table 3–1 SA100 Controls and Indicators
Control/Indicator
PORT SELECT A
PORT SELECT B
FAULT
Ready
UNIT NUMBER
TZ857
Function/State
In the enable (in) position, PORT SELECT
A allows the HSC to access port A. Under
microprogram control, the HSC can then cause
port A to go on-line.
Placing PORT SELECT A in the disable (out)
position with port A on-line causes serious errors
at the HSC.
PORT SELECT A lights when port A is on-line
(ready to receive any command or data).
The definition of PORT SELECT B for port B is
the same as the definition of PORT SELECT A
for port A.
The fault indicator lights when a potentially fatal
error has been detected in the formatter. Even
though an error has occurred, the formatter still
attempts to communicate with the HSC.
With a fatal error present, press the FAULT
switch to clear the error.
The ready indicator lights after the SCSI/STI
adapter successfully completed its power-on
self-tests.
DSA unit number.
See the Tx857 Series Magazine Tape Subsystem
Owner's Manual.