Digital Equipment DECstation 5000/100 Series, Maintenance Manual

Page: 297 / 392

System Module Tests
The following entries explain the commands, parameters, and
error messages for each system module test.
Halt Button Test
The halt button test checks whether the halt button is
connected and can generate an interrupt. To run the halt
button test, type
t 3/misc/halt [ number ], and press Return.
When you type the halt button command, replace number with
the number that specifies the type of test you want to run.
Specify 0 to check whether the halt button is pressed. If
you specify 0 and the button is pressed when the test runs,
the test reports an error. 0 is the default value.
Specify a number from 1 to 9 to check whether the button
responds when pressed. Press the button the same number
of times as the number you specify in the test command.
Halt button test error messages
There are two halt button test error messages.
?TFL: 3/misc/halt (1:SIR= xxxxxxxx ) indicates that the halt
button is pressed in. xxxxxxxx represents the value in the
system interrupt register.
?TFL: 3/misc/halt (2: invld bits: SIR=
xxxxxxxx
) indicates
that the system interrupt register contains an impossible
combination of halt- button bits.
xxxxxxxx
represents the
value found in the system interrupt register.
Base System Test Commands and Messages D–5