language: pleasant asset syntax for palettes, CHR, bg, sfx, music
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
2026-04-13 16:09:53 +00:00
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