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re: the trailing data table is a per-phase TIMELINE of scheduled routines

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Decodes the table found at the end of every phase region.  Layout:

    int  N
    N x [ int offset ; float t ; int kind ]      -- 8-byte typed records,
                                                    tag 0x19 int, 0x1A float

1 + 3N matches the record count in every phase measured (Stage 02: 76/40/55
records for N = 25/13/18).

Checks, all independent of each other:
  schedule entries disc-wide                675
  0x1A float records disc-wide              675   (counted by a different route)
  offsets landing on the instruction stream 675/675 = 100.0%
  control, random 4-aligned offsets                  33.3%

The floats are seconds -- 0, 0.5, 1, 4, 5, 30, 50, 60, 90, 120, 150, 170, 180, 210,
240, 270, 300, 330, 360, 420, 570, 1020, 1080, 1140, 1170 -- and the targets are small
one-shot coroutines that set arguments, call one built-in and end_coroutine.  kind is
0 (556) or 5 (119) and is not identified.

Runtime cross-check, recorded as consistency rather than confirmation: the closed
REMAINING OB work measured Stage 02's squadron arrivals at t = 0, 120 and 210 s over
n=5 emulator runs, and all three appear in phase 1's static schedule, with 120 and 210
each appearing TWICE.  These are round numbers and phase 1 has ~22 distinct times over
0-1170, so presence alone is not unlikely; the doubling is the sharper detail and was
not predicted in advance.

New artefacts data/isl-stage02-schedule.txt and data/isl-schedule-all.txt with a
committed generator (isl_report.py schedule).  calls, phase-ends, conditions and
phase-guards all regenerate byte-identical.

Not settled and said so: kind is unread; the consumer is unread, so the decode rests
on the structural checks above; whether the clock is per-phase or per-mission is an
inference from the layout; and this is NOT what starts the unreachable code -- 0 of
the 675 targets are unreached run-starts, so that ~15% gap stands.
This commit is contained in:
Sylpheed RE agent
2026-08-27 07:07:35 +00:00
parent 02d3c9c82b
commit 2463748a71
6 changed files with 1236 additions and 2 deletions
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1012
docs/re/data/isl-schedule-all.txt Normal file
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# Stage02.ssb — phase timelines
Generated by `tools/re-capture/isl_report.py schedule`.
Each phase ends with a table of `(routine offset, time in seconds, kind)`.
56 entries.
## phase 1 — 25 scheduled routines
t=0 kind=5 -> 0x002C04
t=0.5 kind=5 -> 0x002C6C
t=1 kind=5 -> 0x002CE0
t=1 kind=0 -> 0x00747C
t=4 kind=5 -> 0x002D30
t=30 kind=0 -> 0x00323C
t=30 kind=0 -> 0x007754
t=60 kind=0 -> 0x007804
t=90 kind=0 -> 0x003448
t=90 kind=0 -> 0x0078B4
t=120 kind=0 -> 0x003A2C
t=120 kind=0 -> 0x007964
t=170 kind=0 -> 0x003F84
t=170 kind=0 -> 0x007AB4
t=210 kind=0 -> 0x00461C
t=210 kind=0 -> 0x007C04
t=240 kind=0 -> 0x004AF8
t=240 kind=0 -> 0x007D54
t=270 kind=0 -> 0x007EA4
t=300 kind=0 -> 0x007F54
t=330 kind=0 -> 0x0080A4
t=1020 kind=0 -> 0x008154
t=1080 kind=0 -> 0x008204
t=1140 kind=0 -> 0x0082B4
t=1170 kind=0 -> 0x008364
## phase 2 — 13 scheduled routines
t=0 kind=5 -> 0x0183D4
t=0.5 kind=5 -> 0x01843C
t=1 kind=0 -> 0x01F230
t=4 kind=5 -> 0x0184B0
t=30 kind=0 -> 0x0186F8
t=60 kind=0 -> 0x01892C
t=180 kind=0 -> 0x018B78
t=240 kind=0 -> 0x018ED4
t=300 kind=0 -> 0x01F488
t=330 kind=0 -> 0x01F538
t=360 kind=0 -> 0x01F5E8
t=420 kind=0 -> 0x019118
t=570 kind=0 -> 0x01F698
## phase 3 — 18 scheduled routines
t=0 kind=5 -> 0x0289EC
t=0.5 kind=5 -> 0x028A54
t=1 kind=0 -> 0x028EC0
t=1 kind=0 -> 0x02E364
t=4 kind=5 -> 0x028AC8
t=5 kind=5 -> 0x028E30
t=50 kind=0 -> 0x029724
t=120 kind=0 -> 0x0299C8
t=120 kind=0 -> 0x02E63C
t=150 kind=0 -> 0x02A7BC
t=150 kind=0 -> 0x02E78C
t=180 kind=0 -> 0x029D14
t=240 kind=0 -> 0x02E8DC
t=270 kind=0 -> 0x02E98C
t=300 kind=0 -> 0x02A92C
t=300 kind=0 -> 0x02EA3C
t=330 kind=0 -> 0x02EAEC
t=360 kind=0 -> 0x02EB9C