Cray CRAY-1 - Page 95

I
When the i designator is 4, the instruction transmits the contents of Sj
to the real-time clock register. When the j designator is 0, the real-
time clock is cleared.
If the Programmable Clock Interrupt (PCI) Option is installed, the content
of the k field is relevant for this instruction.
Hold issue conditions
034 - 037 in process
Exchange in process
For 0010, 0011, 0012, 0013, and 0014, Aj or Sj or Ak Reserved
Execution
time
Instruction issue 1 CP
Special cases
If the program is not in monitor mode, instruction becomes a
no-op although all hold issue conditions remain effective.
For 0010, 0011, and 0012:
If j = 0, instruction is a no-op
If (Aj) < 2 or (Aj)~ 31
8
,
instruction is a no-op
If k = 0, CA or CL is set to 1
For 0013:
If j = 0, XA register is cleared
For 0014:
If j = 0, RTC register is cleared
Correct priority interrupting channel number can be read (via
033 instruction) 2 CP after issue of 0012 instruction.
2240004
4-9
E