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https://github.com/imjasonh/nescript
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A complete, playable port of the card game War: title screen with 0/1/2 player menu, animated deal, sliding cards, deck-count HUD, a "WAR!" tie-break with buried cards, and a victory screen with a fanfare. Source split across examples/war/*.ne (constants, assets, audio, deck/queue logic, RNG, render helpers, and one state file per game state) and pulled in via examples/war.ne. Drives nearly every NEScript subsystem at once: custom 88-tile sprite sheet (card frames, ranks, suits, font, BIG WAR letters); felt background nametable; pulse-1 / pulse-2 / noise sfx; looping march on pulse 2; an 8-bit Galois LFSR PRNG; queue-based decks that conserve cards across rounds; a phase machine inside the Playing state that handles draw/reveal/win/war/check; and an autopilot that boots straight into 0-PLAYERS mode so the headless jsnes harness captures real gameplay at frame 180. While building this I uncovered five compiler bugs / limitations in the v0.1 implementation; each is documented with a minimal reproduction, root cause, current workaround, and proposed fix in examples/war/COMPILER_BUGS.md. The most painful was the parameter-VarId aliasing one (#1b) — two functions sharing a parameter NAME end up sharing a single zero-page slot mapping across the whole program. Once those compiler bugs are fixed, the workarounds in war/*.ne should be reverted in the same PR. https://claude.ai/code/session_0143dTgh3UeRrtfHgQwzcv5z
73 lines
2.5 KiB
Text
73 lines
2.5 KiB
Text
// war/victory_state.ne — the Victory state.
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//
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// Big "PLAYER A WINS" or "PLAYER B WINS" banner, the builtin
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// `fanfare` music, an auto-return to Title after
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// VICTORY_LINGER_FRAMES frames, and a manual "press A to skip"
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// path.
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state Victory {
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on enter {
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victory_timer = 0
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start_music fanfare
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}
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on frame {
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global_tick += 1
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victory_timer += 1
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// ── Banner ──────────────────────────────────────
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// "PLAYER X" on row 1, "WINS" on row 2. Splitting the
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// banner across two y rows keeps each scanline under the
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// NES's 8-sprite-per-scanline limit (the "PLAYER X WINS"
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// single-line version was 11 sprites tall and dropped
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// letters past the 8th).
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draw_word_player(64, 80)
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if winner == 0 {
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draw_letter(120, 80, 0) // A
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} else {
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draw_letter(120, 80, 1) // B
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}
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draw_word_wins(96, 96)
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// Flourish: draw the winning deck's top card in the
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// middle of the screen as a victory showcase. If the
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// deck is empty (shouldn't happen — we only arrive
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// here because the *loser* is empty) fall back to a
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// card back so the layout is stable.
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if winner == 0 {
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if deck_a_count > 0 {
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var vic_top_a: u8 = deck_a[deck_a_front]
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draw_card_face(120, 128, vic_top_a)
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} else {
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draw_card_back(120, 128)
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}
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} else {
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if deck_b_count > 0 {
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var vic_top_b: u8 = deck_b[deck_b_front]
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draw_card_face(120, 128, vic_top_b)
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} else {
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draw_card_back(120, 128)
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}
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}
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// Row of tiny hearts under the banner.
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draw Tileset at: (80, 168) frame: TILE_HEART_TINY
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draw Tileset at: (96, 168) frame: TILE_HEART_TINY
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draw Tileset at: (112, 168) frame: TILE_HEART_TINY
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draw Tileset at: (128, 168) frame: TILE_HEART_TINY
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draw Tileset at: (144, 168) frame: TILE_HEART_TINY
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draw Tileset at: (160, 168) frame: TILE_HEART_TINY
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// ── Input + auto-return ─────────────────────────
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if button.a or button.start {
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transition Title
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}
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if victory_timer >= VICTORY_LINGER_FRAMES {
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transition Title
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}
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}
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on exit {
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stop_music
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}
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}
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