imjasonh/nescript
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language: pleasant asset syntax for palettes, CHR, bg, sfx, music

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Adds six NES-friendly authoring shortcuts so programs don't have to
hand-pack hex bytes for every kind of art asset. Every new syntax is
strictly additive — existing examples keep their byte-identical ROMs
and goldens.

  * palette: ~50 named NES colours (`black`, `sky_blue`, `dk_red`, …)
    usable anywhere a colour byte is expected, plus a grouped-form
    `bg0..sp3` + `universal:` shape that auto-fills every sub-
    palette's first byte (fixing the `$3F10` mirror trap).
  * sprite: `pixels:` ASCII-art alternative to 16-byte CHR, supporting
    multi-tile sprites split in row-major reading order.
  * sfx: scalar `pitch:` matching the v1 driver's latch-once behaviour,
    plus `envelope:` as a friendlier alias for `volume:`.
  * music: `tempo:` default duration + note-name notes (`C4, Eb4,
    rest 10`) alongside the existing `pitch, duration` pair form.
  * background: `legend { '.': 0, '#': 1 }` + `map:` string rows,
    plus `palette_map:` grids that auto-pack the 64-byte attribute
    table from 16×15 sub-palette digits.

A new `examples/friendly_assets.ne` exercises every shortcut at once
with a matching pixel + audio golden; the other 22 golden tests still
match byte-for-byte.

https://claude.ai/code/session_01PzaSFj3VahDzxEYTKCESkz
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Claude 2026-04-13 16:09:53 +00:00
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@ -82,6 +82,7 @@ start Main
| [`sprites_and_palettes.ne`](examples/sprites_and_palettes.ne) | Inline CHR data, scroll, type casting |
| [`mmc1_banked.ne`](examples/mmc1_banked.ne) | MMC1 mapper, bank declarations, multiply |
| [`palette_and_background.ne`](examples/palette_and_background.ne) | Palette and background declarations, reset-time load, vblank-safe `set_palette` / `load_background` swaps |
| [`friendly_assets.ne`](examples/friendly_assets.ne) | **Pleasant asset syntax** — named NES colours, grouped `bg0..sp3` palettes with `universal:`, ASCII pixel-art sprites, `legend { } + map:` tilemaps, `palette_map:` attribute grids, scalar sfx `pitch:`, note-name music with `tempo:` |
| [`structs_enums_for.ne`](examples/structs_enums_for.ne) | Structs, enums, `for` loops, struct literals |
| [`inline_asm_demo.ne`](examples/inline_asm_demo.ne) | Inline asm with `{var}` substitution, `poke`/`peek` |
| [`audio_demo.ne`](examples/audio_demo.ne) | Audio subsystem: user `sfx`/`music` blocks, builtin effects, `play`/`start_music`/`stop_music` |