MON 60B 064B - ISTOHIST (STOP HISTOGRAM)

Stops histogram sampling (removes the histogram message from the exec-queue via RLHILOG).

Status: dispatch byte-verified; body from 5P-P2-MON60.NPL (.npl); L07 body loc pending.

Handler (verbatim in .npl)

• Require reserved by caller (RTREF=5HRTP), else EHNRESERVED.
• If started (5HIFLAG=1) -> CALL RLHILOG (release/dequeue). Clear 5HRTP. GO FAR 5OKRET.

Byte status

VERIFIED: dispatch + 5IFUNC[064]. From NPL: body. PENDING: L07 body address.