If the clocks should run out of low-order synchronization, after the
clocks are synchronized (during or after system initialization), you
will receive the following message: DMKCLK970W TOO CLOCK SYNC CHECK RECEIVED CLOCK SYNCHRONIZATION-PRESS 'TOO ENABLE SET' As before, press the TOO Enable SET Key to synchronize the clocks. VM/370 uses the interval timer to support time slicing; therefore,
during initialization, the system verifies that the interval timer is
running before virtual machine logon operations are performed. The system initialization routine will loop issuing the following message if
the interval timer is found not running when tested: TURN ON THE INTERVAL TIMER TURN ON THE INTERVAL TIMER The messages cease when the operator complies by enabling the
interval timer and the system initialization process continues.
In attached processor application the text of
the processor owning the disabled interval timer.
follows: TURN ON THE { MAIN } PROCESSOR INTERVAL TIMER ATTACHED
the message indicates
This message reads as
To continue, the interval timer must be enabled on the requested
processor. CONSOLE DEFINITION The terms "system console", "primary system console", and "alternate system console" apply to those console devices that exercise primary control of the processor.
The VM/370 primary system console can be a real system console, a
real alternate system console, or a local 3270. The VM/370 alternate system console can be a real system console, a
real alternate system console, a local 3270, or any VM/370 supported
remote terminal on a leased line connected to a 270x transmission control unit (TCU). The VM/370 alternate system console cannot be a remote terminal connected to a 370x TCU. !Qte: If the 370x is loaded with the 270x Emulation Program prior to
initializing VM/370, the 370x then appears to V8/370 as a 270x TCU. The following examples show the various configurations that can
control YM/370 operations. Section 2. Initiating VM/370 Operation 19

Ii!§! £onfigy!gtion: Real systea console = '8/370 system console
Real alternate system console = '8/370 alternate system console Real systea console = Batch virtual machine Real alternate system console = '8/370 system console Remote ter.inal = V8/370 alternate system console !hird Real systea console = V8/370 system console
Reaote terminal = V8/370 alternate system ccnsole
Real systea console = Batch virtual aachine
Tvo locally attached 3277 Display Stations = '8/370 system console
and alternate system console Enabled reaote terainal (not 3270) = '8/370 alternate systea
console (10 valid V8/370 priaary system console is designated in SYSGEI) !2te: The real system consoles must be turned off to prevent V8/370 froa using thea. ConfigY!stign: Systea console = '8/370 systea console (No V8/370 alternate console designated in SYSGEN) The first four configurations allov disabling of the V8/370 priaary console and selection of an alternate '8/370 console; or, conversely,
reselection of the '8/370 priaary console and disabling of the alternate
console.
Configurations five and six indicate that V8/370 specified no console substitution. Therefore, if the system console is inoperative at V8/370 startup, the
vait state and cannot continue. After the console
again, '8/370 aust be reloaded into the real systea. DISABLING THE '8/370 PRI8ARY COl SOLE system generation
designated '8/370 system enters the
becomes operative
If the '8/370 primary system console is inoperative, V8/370 aatoaatically selects the first alternate console (specified in the RIOGEN macro instruction) as the console for Frimary systea operation.
If the first alternate console specified is not operational, an atteapt viII be aade to start the next alternate console. If an operational
console is found, it viII be used as the V!/370 system operator's
console. 20 '8/370 Operator's Guide