User`s guide
When the 
CPU 
enters the console  mode,  it  prints 
on 
the console  terminal: 
•  A question  mark followed by a  two-digit halt code (Table 2-1). 
•  The address contained 
in 
the  program counter (PC). 
• 
The console  prompt symbol, 
»>. 
For example: 
P  !  CTRL/P 
typed 
at 
the 
console 
terminal 
?02 
PC=nnnnnnnn 
! 
Halt 
code 
followed 
by 
the 
PC 
address 
») 
! 
Console 
prompt 
2.2  FRONT 
PANEL 
CONTROLS AND INDICATORS 
The front panel of the VAX-l 
1/730 
has two switches and four indicator lights.  These switches, indicator 
lights,  and their functions  are identified  below. 
2.2.1  Six-Position Keylock Switch 
The 
six 
positions  of keylock switch and the functions  of each are shown 
in 
Table 2-2. 
Table 2-2  Functions 
of 
the Six-Position Keylock Switch 
Position  Function 
OFF 
No 
power 
is 
applied to the 
CPU 
or to  memory. 
STD 
BY 
Power 
is 
applied to  main memory, the WCS module  and to  the  TUS8 tape 
drives. 
LOCAL  Power 
is 
applied  to  the 
CPU 
and to  memory allowing  the 
CPU 
to  respond  to 
console commands. The remote access  port 
is 
disabled. 
LOCAL/DISABLE  The 
CPU 
does not respond to console commands, however the console terminal 
functions as  a user terminal.  The  remote  access  port 
is 
disabled.  The  BOOT 
position 
of 
the 
AUTO 
RESTART 
switch 
is 
ignored. 
REMOTE/DISABLE 
The console terminal 
is 
disabled.  The remote access  port 
is 
enabled, allowing  a 
terminal connected  to it  to  be  used 
as 
a  user  terminal.  The 
CPU 
does  not 
respond  to console commands from  this  remote terminal. 
REMOTE 
The remote terminal functions 
as 
the console  terminal.  The console  terminal 
is 
disabled  unless  enabled by the remote terminal. 
2-3 










