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docs(opcodes): 0x215 = native graphics-object query (root cause of gfx drift)

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Investigation upgrade: 0x215 queries the native object manager by element
handle-id (0x62455[idx]) and returns the object's slot/status; sign-tested to
drive label_12649's slot-select. Stubbing it collapses all draws onto slot 0 →
the anchor-preserve geometry reads foreign textures → cumulative bg/sprite
drift. Keystone for the graphics object-manager; exact return via unicorn
(handler @0x421160).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
gamer147
2026-07-06 23:21:08 -04:00
parent d177a31185
commit 2951425108
3 changed files with 13 additions and 13 deletions
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tools/age_opcodes_himegari.py
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@@ -21,7 +21,7 @@ INFERRED: dict[int, dict] = {
0x1ff: dict(name='draw?', category='draw', noop=False, confidence='low', source='inference', summary='4 args (global+imms); follows 0x217, then call'),
0x202: dict(name='draw-blit?', category='draw', noop=False, confidence='med', source='inference', summary='5 args (coords/sizes); preceded by coord arithmetic, near draw ops'),
0x203: dict(name='draw?', category='draw', noop=False, confidence='med', source='inference', summary='4 args; chains with 0x202/draw-texture'),
0x215: dict(name='count?', category='compute', noop=False, confidence='med', source='inference', summary='2 args -> writes global then result tested >0 (gre/lt) — count/search-returns-index helper'),
0x215: dict(name='query-gfx-object?', category='draw', noop=False, confidence='med', source='investigation', summary="0x215 (out)(handle_id) — queries the native graphics-object manager by element handle-id (the value in 0x62455[idx], often +1/+2 for a sub-element); writes the object's slot/status into `out`, sign-tested (gre/lt 0) to drive label_12649's slot-select branch and set the working slot G[0x62452]. KEYSTONE for per-object slot selection — stubbing it collapses every draw onto slot 0, so the anchor-preserve geometry reads foreign-sized textures → cumulative bg/sprite drift (see docs/phase-a-slice-plan.md A2b-Geometry). Reads native object-manager state (NOT VM-computable). Exact return semantics: RE via unicorn (native handler @0x421160)."),
0x217: dict(name='gfx-geom?', category='draw', noop=False, confidence='low', source='inference', summary='4 global-ints; part of a 0x217/0x218/0x21a geometry chain'),
0x218: dict(name='gfx-geom?', category='draw', noop=False, confidence='low', source='inference', summary='4 global-ints; chains with 0x21a/0x217'),
0x21a: dict(name='gfx-geom?', category='draw', noop=False, confidence='low', source='inference', summary='4 global-ints; chains with 0x218/0x217'),