Claude 82b3d0d20a metatiles + collision: metatileset, room, paint_room, collides_at ... Closes §H. 2×2 metatiles and a parallel collision map are now a first-class construct. `metatileset Name { metatiles: [{ id, tiles, collide }, ...] }` declares a library of 2×2 tile bundles. `room Name { metatileset: M, layout: [...] }` lays them out on a 16×15 grid. The compiler expands each room at compile time into: - a 960-byte nametable (`__room_tiles_<name>`) - a 64-byte attribute table (`__room_attrs_<name>`) - a 240-byte collision bitmap (`__room_col_<name>`) `paint_room Name` reuses the vblank-safe `load_background` update machinery for the nametable blit and installs the collision bitmap pointer into `ZP_ROOM_COL_LO`/`ZP_ROOM_COL_HI` (ZP $18/$19). `collides_at(x, y)` JSRs into a small runtime helper that reads `(room_col),Y` with `Y = (y & 0xF0) | (x >> 4)` and returns 0/1. The helper links in only when the `__collides_at_used` marker is emitted, so programs that declare a room but never query it pay zero bytes for the subroutine. `parse_byte_array` grows a `[value; count]` shortcut — 240-entry `layout` arrays are unwieldy to spell out a byte at a time. See `examples/metatiles_demo.ne` for the end-to-end flow: a probe sprite bounces off walls via `collides_at` and lands on the left side of the playfield at frame 180 — direct evidence that the collision query works. Also defers the register-allocator work from §"Code quality / tooling" and documents the audio-goldens constraint in future-work so the next agent sees it.		2026-04-19 01:28:17 +00:00
..
arrays_and_functions.audio.hash
arrays_and_functions.png	compiler: fix three scoping bugs; war: revert all local/param workarounds	2026-04-15 20:33:41 +00:00
audio_demo.audio.hash	codegen: emit gate markers at end of generate() to protect peephole	2026-04-16 21:31:47 +00:00
audio_demo.png
auto_chr_background.audio.hash	assets: auto-generate CHR data from @nametable() PNG sources	2026-04-15 03:29:58 +00:00
auto_chr_background.png	assets: auto-generate CHR data from @nametable() PNG sources	2026-04-15 03:29:58 +00:00
auto_sprite_flicker.audio.hash	compiler: GNROM / debug port / sprite flicker / fade / sprite-0 split + docs	2026-04-18 19:31:55 +00:00
auto_sprite_flicker.png	compiler: GNROM / debug port / sprite flicker / fade / sprite-0 split + docs	2026-04-18 19:31:55 +00:00
axrom_simple.audio.hash	compiler: PRNG / edge input / palette fade / AxROM / CNROM / FCEUX labels	2026-04-18 18:13:18 +00:00
axrom_simple.png	compiler: PRNG / edge input / palette fade / AxROM / CNROM / FCEUX labels	2026-04-18 18:13:18 +00:00
bitwise_ops.audio.hash
bitwise_ops.png
bouncing_ball.audio.hash
bouncing_ball.png
cnrom_simple.audio.hash	compiler: PRNG / edge input / palette fade / AxROM / CNROM / FCEUX labels	2026-04-18 18:13:18 +00:00
cnrom_simple.png	compiler: PRNG / edge input / palette fade / AxROM / CNROM / FCEUX labels	2026-04-18 18:13:18 +00:00
coin_cavern.audio.hash
coin_cavern.png
comparisons.audio.hash
comparisons.png	codegen: emit gate markers at end of generate() to protect peephole	2026-04-16 21:31:47 +00:00
edge_input_demo.audio.hash	compiler: PRNG / edge input / palette fade / AxROM / CNROM / FCEUX labels	2026-04-18 18:13:18 +00:00
edge_input_demo.png	compiler: PRNG / edge input / palette fade / AxROM / CNROM / FCEUX labels	2026-04-18 18:13:18 +00:00
fade_demo.audio.hash	compiler: GNROM / debug port / sprite flicker / fade / sprite-0 split + docs	2026-04-18 19:31:55 +00:00
fade_demo.png	compiler: GNROM / debug port / sprite flicker / fade / sprite-0 split + docs	2026-04-18 19:31:55 +00:00
feature_canary.audio.hash	examples: add feature_canary that turns red on any memory silent-drop regression	2026-04-18 00:14:40 +00:00
feature_canary.png	examples: add feature_canary that turns red on any memory silent-drop regression	2026-04-18 00:14:40 +00:00
friendly_assets.audio.hash	codegen: emit gate markers at end of generate() to protect peephole	2026-04-16 21:31:47 +00:00
friendly_assets.png
function_chain.audio.hash
function_chain.png
gnrom_simple.audio.hash	compiler: GNROM / debug port / sprite flicker / fade / sprite-0 split + docs	2026-04-18 19:31:55 +00:00
gnrom_simple.png	compiler: GNROM / debug port / sprite flicker / fade / sprite-0 split + docs	2026-04-18 19:31:55 +00:00
hello_sprite.audio.hash
hello_sprite.png
hud_demo.audio.hash	docs + example: HUD demo and language-guide VRAM buffer section	2026-04-18 21:34:44 +00:00
hud_demo.png	runtime: reset PPU scroll after VRAM buffer drain	2026-04-18 22:57:46 +00:00
i16_demo.audio.hash	compiler: i16 / SRAM saves / inline-asm dot labels / docs	2026-04-18 20:49:06 +00:00
i16_demo.png	compiler: i16 / SRAM saves / inline-asm dot labels / docs	2026-04-18 20:49:06 +00:00
inline_asm_demo.audio.hash
inline_asm_demo.png	codegen: reuse analyzer's local allocations so inline asm {param} works	2026-04-16 16:03:10 +00:00
logic_ops.audio.hash
logic_ops.png
loop_break_continue.audio.hash
loop_break_continue.png
match_demo.audio.hash
match_demo.png
metasprite_demo.audio.hash	parser/lowering: declarative metasprites for multi-tile sprite groups	2026-04-15 03:13:30 +00:00
metasprite_demo.png	parser/lowering: declarative metasprites for multi-tile sprite groups	2026-04-15 03:13:30 +00:00
metatiles_demo.audio.hash	metatiles + collision: metatileset, room, paint_room, collides_at	2026-04-19 01:28:17 +00:00
metatiles_demo.png	metatiles + collision: metatileset, room, paint_room, collides_at	2026-04-19 01:28:17 +00:00
mmc1_banked.audio.hash
mmc1_banked.png
mmc3_per_state_split.audio.hash
mmc3_per_state_split.png
nested_structs.audio.hash	analyzer/lowering: support nested struct fields and array struct fields	2026-04-15 02:19:49 +00:00
nested_structs.png	analyzer/lowering: support nested struct fields and array struct fields	2026-04-15 02:19:49 +00:00
noise_triangle_sfx.audio.hash	codegen: emit gate markers at end of generate() to protect peephole	2026-04-16 21:31:47 +00:00
noise_triangle_sfx.png	audio: triangle and noise sfx channels	2026-04-14 10:42:53 +00:00
palette_and_background.audio.hash
palette_and_background.png	codegen: emit gate markers at end of generate() to protect peephole	2026-04-16 21:31:47 +00:00
palette_brightness_demo.audio.hash	compiler: PRNG / edge input / palette fade / AxROM / CNROM / FCEUX labels	2026-04-18 18:13:18 +00:00
palette_brightness_demo.png	compiler: PRNG / edge input / palette fade / AxROM / CNROM / FCEUX labels	2026-04-18 18:13:18 +00:00
platformer.audio.hash	examples: move state-scoped globals to state-local in coin_cavern + platformer	2026-04-17 11:58:02 +00:00
platformer.png	feat(platformer): add stomp-or-die enemy collisions, live HUD, GameOver state	2026-04-13 20:23:07 +00:00
pong.audio.hash	analyzer+codegen: lift the 4-param ceiling via a direct-write calling convention	2026-04-18 02:34:56 +00:00
pong.png	codegen: fuse compare-then-branch to drop boolean materialization	2026-04-16 17:10:02 +00:00
prng_demo.audio.hash	compiler: PRNG / edge input / palette fade / AxROM / CNROM / FCEUX labels	2026-04-18 18:13:18 +00:00
prng_demo.png	review: tighten PRNG / void-intrinsic / FCEUX path handling	2026-04-18 18:48:55 +00:00
scanline_split.audio.hash
scanline_split.png
sfx_pitch_envelope.audio.hash	codegen: emit gate markers at end of generate() to protect peephole	2026-04-16 21:31:47 +00:00
sfx_pitch_envelope.png	linker: skip default palette + rendering enable for non-visual ROMs	2026-04-16 21:15:08 +00:00
sha256.audio.hash	examples/sha256: interactive SHA-256 hasher with on-screen keyboard	2026-04-16 14:02:58 +00:00
sha256.png	examples/sha256: interactive SHA-256 hasher with on-screen keyboard	2026-04-16 14:02:58 +00:00
signed_compare.audio.hash	ir/codegen: signed comparison lowering for i8/i16	2026-04-19 00:17:34 +00:00
signed_compare.png	ir/codegen: signed comparison lowering for i8/i16	2026-04-19 00:17:34 +00:00
sprite_0_split_demo.audio.hash	compiler: GNROM / debug port / sprite flicker / fade / sprite-0 split + docs	2026-04-18 19:31:55 +00:00
sprite_0_split_demo.png	compiler: GNROM / debug port / sprite flicker / fade / sprite-0 split + docs	2026-04-18 19:31:55 +00:00
sprite_flicker_demo.audio.hash	sprite-per-scanline: add cycle_sprites runtime flicker + debug telemetry	2026-04-15 22:07:19 +00:00
sprite_flicker_demo.png	sprite-per-scanline: add cycle_sprites runtime flicker + debug telemetry	2026-04-15 22:07:19 +00:00
sprites_and_palettes.audio.hash
sprites_and_palettes.png
sram_demo.audio.hash	compiler: i16 / SRAM saves / inline-asm dot labels / docs	2026-04-18 20:49:06 +00:00
sram_demo.png	compiler: i16 / SRAM saves / inline-asm dot labels / docs	2026-04-18 20:49:06 +00:00
state_machine.audio.hash
state_machine.png
structs_enums_for.audio.hash
structs_enums_for.png
two_player.audio.hash
two_player.png
uxrom_banked.audio.hash
uxrom_banked.png
uxrom_banked_to_banked.audio.hash	codegen: support banked → banked cross-bank function calls	2026-04-15 02:37:19 +00:00
uxrom_banked_to_banked.png	codegen: support banked → banked cross-bank function calls	2026-04-15 02:37:19 +00:00
uxrom_user_banked.audio.hash	codegen: user code in switchable banks via cross-bank trampolines	2026-04-14 11:41:20 +00:00
uxrom_user_banked.png	codegen: user code in switchable banks via cross-bank trampolines	2026-04-14 11:41:20 +00:00
vram_buffer_demo.audio.hash	compiler: VRAM update buffer (nt_set / nt_attr / nt_fill_h)	2026-04-18 21:14:31 +00:00
vram_buffer_demo.png	runtime: reset PPU scroll after VRAM buffer drain	2026-04-18 22:57:46 +00:00
war.audio.hash	analyzer+codegen: lift the 4-param ceiling via a direct-write calling convention	2026-04-18 02:34:56 +00:00
war.png	examples: regenerate ROMs, gifs, and goldens after codegen local fix	2026-04-16 16:12:46 +00:00