This content originally appeared on DEV Community and was authored by Nivando Soares
Porting Test Drive II from SNES to PC, Part 46: Demoting game_11.mss from gameplay seed to front-end menu state
The last Lane 3 checkpoint needed a correction.
I had promoted the current game_11.mss sweep as if it were a gameplay seed.
It is not.
The new audit proves that the current mutable game_11.mss starts in a
front-end menu family, even though some captured frames pass through a
gameplay-like cockpit surface.
That distinction matters, because a screenshot that looks like gameplay is not
enough on its own.
The state and selector family have to agree too.
The new guardrail is a seed-surface audit
tools/run_track1_seed_sweep.py now runs a short no-input audit before it
classifies any sweep result.
On the current game_11.mss, that audit stays on:
active_main = 02:9016$1C6A = 1$1C70 = 0$1C76 = 1$0202 = 0xFFFF
for frames 0..7.
That is now classified as:
front_end_menu_seed
So the sweep output is still useful, but only as menu/presentation evidence for
this seed family.
Why the old reading was misleading
The trap is easy to see once the audit is explicit.
At frame 060, the same seed shows a cockpit-like surface:
But by frame 219, the seed is back on the top-level signboard menu:
That means the current seed can traverse gameplay-like presentation imagery
without becoming verified gameplay state.
So the old “first useful gameplay branch at frame 219” reading was too
strong.
What we really have is this:
-
a_holdandb_holdcollapse onto the same menu-bound corridor -
a+bfirst diverges at frame219 - that divergence is deterministic
- but it is still not gameplay-backed on this seed
What changes next
The next Lane 3 gate is now stricter and simpler:
- stop promoting more
game_11.msssweep output as gameplay - recover a true gameplay seed or deterministic input program that lands outside the top-menu selector family
- rerun the bounded sweep only after that
That is a better outcome than quietly building more archaeology on top of a bad
seed assumption.
This content originally appeared on DEV Community and was authored by Nivando Soares
Nivando Soares | Sciencx (2026-03-27T20:36:41+00:00) Porting Test Drive II from SNES to PC, Part 46: Demoting game_11.mss from gameplay seed to front-end menu state. Retrieved from https://www.scien.cx/2026/03/27/porting-test-drive-ii-from-snes-to-pc-part-46-demoting-game_11-mss-from-gameplay-seed-to-front-end-menu-state/
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