Cray CRAY-1 - 0014 Jk Programmable Clock Interrupt Functions

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I 0014jk Programmable clock interrupt functions
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When the Programmable Clock Interrupt Option is installed, subfunctions
of the 0014 monitor mode instruction defined by the k designator are
recognized.
When the Programmable Clock Option is not installed, none of
these subfunctions is recognized and the instruction is always interpreted
as an enter real-time clock register instruction.
The following subfunctions are defined by the k designator:
0014jO
0014j4
0014j5
0014j6
0014j7
Enter the
real-time clock register with (Sj)
Enter interrupt interval (II) register with (Sj)
Clear the programmable clock interrupt request
Enable
programmable clock interrupt request
Disable
programmable clock interrupt requests
When the k designator is 0, this instruction loads the contents of the Sj
register into the real-time clock (RTC) register. When the j designator
is 0, the real-time clock register is cleared.
When the k designator is 4, this instruction loads the lower 32 bits
from the Sj register into both the Interrupt Interval (II) register and
the Interrupt Countdown (ICD) counter.
When the k designator is 5, this instruction clears the programmable clock
interrupt request if the request was previously set by an interrupt count
down to zero.
When the k designator is 6, this instruction enables repeated programmable
clock interrupt requests at a repetition rate determined by the value
stored in the Interrupt Interval (II) register.
When the k designator is 7, this instruction disables repeated programmable
clock interrupt requests until a 0014j6 instruction is executed to enable
the requests.
Refer to section 6 for additional information about the Programmable Clock
Interrupt Option.
2240004
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