Segment map and timeline

Metadata

Field	Value
source	../deep-research-report.md
document	Deep Research Report: It Took Every SNES Hardware Trick To Make My Game — Inkbox
kind	section-lead
parent
lines	55-82
video	https://www.youtube.com/watch?v=j_2bo7ng65E
findings	D13-C1 D13-C2 D13-M1 D13-M6 D13-m1 D13-m2

Source video: It Took Every SNES Hardware Trick To Make My Game (Inkbox, 51:14) · at 08:40. The audio section starts here, not at 36:15 as the segment map says. Four of the seven segments are at the wrong time.

Important: the timestamps in this section are analytical estimates, not transcript-derived chapter markers. They divide the ~51:15 working runtime according to the topical progression described in contemporary coverage. Every boundary marked ⚠ should be checked against the actual player before being used for citation, editing or academic quotation. citeturn35search2turn35search6

Segment #	Start	End	Duration	Summary	Key concepts
1	~00:00 ⚠	~04:20 ⚠	4:20	Project framing: 〇 Star as the culmination of low-level SNES development, establishing the constraint-driven thesis and showing the finished dungeon crawler. The game is independently confirmed as a native SNES project. citeturn31view2turn35search2	SNES homebrew; assembly; hardware constraints; 〇 Star
2	~04:20 ⚠	~10:45 ⚠	6:25	Introduces the machine budget: Ricoh 5A22/65C816 lineage, 128 KiB system WRAM, ROM mapping and why low-level memory organisation shapes the implementation. citeturn35search6turn28search4turn26search14	5A22; 65C816; WRAM; ROM mapping; assembly
3	~10:45 ⚠	~19:10 ⚠	8:25	Graphics architecture: Mode 1 backgrounds, colour depth, tile/tilemap representation, HUD/counter representation, scrolling and the HDMA technique used for raster/parallax effects. citeturn35search6turn28search9turn37search6	Mode 1; tiles; palettes; HDMA; parallax; BCD
4	~19:10 ⚠	~27:30 ⚠	8:20	World-data section: procedural room generation and compact maze representation are used to get a large shifting dungeon from a small memory budget rather than storing conventional pre-built maps. Detailed dimensions are reported only by the derivative synopsis and therefore remain provisional. citeturn35search6	procedural generation; memory packing; rooms; tunnels; WRAM
5	~27:30 ⚠	~36:15 ⚠	8:45	Runtime optimisation: enemy state machines, sprite pressure, visibility-based collision work, talisman effects and other decisions that make gameplay fit the frame-time budget. citeturn35search6	sprites; OAM; culling; collision; state machines; effects
6	~36:15 ⚠	~45:10 ⚠	8:55	Audio architecture: the separate SPC700/S-SMP environment, 64 KiB audio RAM, BRR samples, eight DSP voices and Inkbox’s custom driver. The released source confirms a five-music-voice/three-effect-voice split. citeturn33search8turn33search13 fileciteturn7file0L2-L2	SPC700; S-DSP; BRR; voices; sound driver
7	~45:10 ⚠	~51:15 ⚠	6:05	Release and implementation wrap-up: sound-engine publication, playable ROM, cartridge/homebrew context and contributor/production credits. The downloadable ROM is independently confirmed at 129 kB in the fetched itch.io snapshot. citeturn31view2 fileciteturn3file0L2-L10	cartridge; ROM release; open source; tooling; credits

The sequence above should be understood as reconstructed topical navigation, not a substitute for YouTube chapters. The reconstruction is most reliable about what topics the video covers, because the same themes recur across the creator’s release materials, source code and Hackaday’s contemporaneous account; it is less reliable about the exact second at which one topic becomes another. citeturn35search2turn31view2

timeline
    title Reconstructed topical flow — all boundaries require timestamp review
    ~00:00–04:20 : Project and 〇 Star framing
    ~04:20–10:45 : CPU, memory and cartridge constraints
    ~10:45–19:10 : Mode 1 graphics, tiles and HDMA
    ~19:10–27:30 : Procedural world generation and data layout
    ~27:30–36:15 : Sprites, gameplay systems and optimisation
    ~36:15–45:10 : SPC700 audio and custom sound engine
    ~45:10–51:15 : Cartridge, release, open source and credits

Review findings for this part

The findings come from ../../findings/ (pass 1). The script matches them to this part by source line.

ID	Severity	Evidence	Status	Location	Problem
D13-C1	critical	VIDEO	open	L59-81, L222, L247	Claim: Segment 6, audio, runs from about 36:15 to 45:10. Segment 2, CPU and memory, runs from 04:20 to 10:45. Segment 3, graphics, runs from 10:45 to 19:10. Problem: The captions show a different order. The audio section starts at 08:40 (“time to tackle SNES audio processing”) and ends at 19:30. The tile engine and scrolling start at 04:10. The memory-bank discussion is at 20:35 to 22:00. The HDMA parallax is at 35:11. The color math is at 36:52, where the document puts audio. The mermaid timeline repeats the same wrong order. The document marks the times as estimates, but the estimates miss by up to 28 minutes.
D13-C2	critical	VIDEO DOC	open	L59-67, L83-271	Claim: Seven segments cover the whole video. Problem: The map has no segment for the object engine: 32-byte objects, the data bank register, the low-RAM mirror, OAM copying and the ninth X bit (19:34 to 24:26). It has no entry for the HUD counters (31:24), the inventory (33:26), the title screen (34:08), color math (36:52), hit stop (40:37), windows and the stair transition (43:19), or the sponsor segment (07:58 to 08:40). The segment “Runtime optimisation” (L65) is one label for eight different topics.
D13-M1	major	VIDEO	open	L64, L190, L313, L323-325	Claim: “192×168 tiles” and “~63 kB” are “provisionally reported” and “unverified game-specific detail”. Problem: The video states these numbers itself: “a 192x 168 tile world”, “a 12x12 grid” of screens, “3072x 2688 pixel image”, and “fills up 63K of RAM” (06:53). The primary source confirms the secondary source. The row at L313 and the list at L325 are now out of date.
D13-M6	major	VIDEO	open	L253-268, L67	Claim: Segment 7 holds “sound-engine publication” and “emulator testing and real-hardware orientation”. Problem: The open-source promise is at 19:07, inside the audio section, not at the end. The video does not discuss emulator testing. The end of the video shows the transparent cartridges (45:36), the solder paste (46:18), a members video (46:55), credits with music (47:35 to 50:10), the free release (50:31), a “maybe” physical release with a poll (50:31), and no Mode 7 or extra chips (50:53).
D13-m1	minor	DOC	open	L5-349	Claim: 107 `citeturn` and 16 `fileciteturn` markers. Problem: These are generation artifacts with hidden control characters. 94 lines of the document carry them. They are not citations. A reader cannot follow them.
D13-m2	minor	VERIFY	verify	L23, L29, L57, L270	Claim: Working duration 51:15, with one snapshot at 51:55. Problem: yt-dlp reports 51:14. The last caption block starts at 50:53. The 51:55 value is wrong. The difference of one second has no effect on the review.

Review worksheet

1. Goal of this part

What does this part try to show, or help the reader decide?

2. Key claims to test

#	Claim	Evidence given (citation / data)	Verifiable?
1

3. Adversarial review

Strongest counter-argument:
Unsupported, overstated, or outdated claims:
Source quality (primary vs. blog/forum/marketing):
Omissions / what a skeptic would ask:
Internal consistency with other segments:

4. Evaluation

Does the segment achieve its goal? (Yes / Partly / No)
Confidence: (High / Medium / Low)
Required fixes: