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CPU
CENTRONICS/PRINTRONIX
INTERFACE
E13 to E14
E17 to E18
Zilog
DATA PRODUCTS INTERFACE
E14 to E15
E16 to E17
CPU
2.9.
Baud Rate Selection
The console serial channel (channell) is identical
to
the
other
serial
channels
except
that the monitor on the CPU
board uses channel 1 to communicate with the system operator
when
the
system
is first turned on.
The four-pole switch
(U70) located toward the center of the CPU board uses switch
positions
one
and four for baud rate selection. The switch
positions two and three select the primary boot device list-
ing
for
the
SPUD
diagnostics.
The initial baud rate for
channell is factory set for 9600 baud.
Table 2-9 lists the
baud
rate
settings
and selection of the primary boot dev-
ices.
The baud rate settings allow a variety
of
terminals
as
the system console.
The primary boot device as selected
by
the switch will always be listed and tested by the
SPUD
diagnostics as the first device on the list.
Table 2-9. Baud Rate Setting and primary Boot Device (U70)
SWITCH
BAUD RATE
SWITCH
PRIMARY DEVICE
1,
4
2,
3
0
0
300
1
1
8 inch Disk
1
0
1200
0
1
5 1/4 inch Disk
0
1
9600
1
0
SMD Disk
1
1
19200
0
0
Reserved
ON
=
0
2-8
Zilog
2-8
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