mirror of
https://github.com/imjasonh/nescript
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53c454669d
With `has_p1_input` false, drop the three-instruction JOY1 shift block from the NMI's input loop. With both `has_p1_input` and `has_p2_input` false, drop the strobe write to \$4016 as well — the entire controller-sampling block disappears. Audio- or compute-only programs that never touch `button.*` pay zero cycles for input sampling. The IR codegen's `__p1_input_used` marker (emitted alongside the P2 one in the previous commit) now drives this path through a new `NmiOptions::has_p1_input` bool and an `NmiOptions::any_input()` helper that's true when either port is active. Savings for a truly non-interactive program: - ~18 bytes of NMI code (strobe + loop scaffold + the 6 bytes of per-port shifting that the P2 gate already caught). - ~80 cycles per frame (the 4 cycles of strobe plus the 5 cycles of DEX/BNE × 8 that the loop would otherwise run; net of the loop overhead that's ~40 cycles, but jsnes measures it as ~80 because the JOY1 read itself was 4c × 8). Two audio goldens flip — the two audio-only examples whose NMI shifts forward by ~27 bytes once the strobe-and-loop block is gone. Same cycle-accurate-APU-timing drift as every prior NMI layout change. https://claude.ai/code/session_016kM6P7PukktBDqTZexrrAN |
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| .. | ||
| arrays_and_functions.audio.hash | ||
| arrays_and_functions.png | ||
| audio_demo.audio.hash | ||
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| auto_chr_background.audio.hash | ||
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| bitwise_ops.audio.hash | ||
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| bouncing_ball.audio.hash | ||
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| coin_cavern.audio.hash | ||
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| comparisons.audio.hash | ||
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| friendly_assets.audio.hash | ||
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| function_chain.audio.hash | ||
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| hello_sprite.audio.hash | ||
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| inline_asm_demo.audio.hash | ||
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| logic_ops.audio.hash | ||
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| loop_break_continue.audio.hash | ||
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| match_demo.audio.hash | ||
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| metasprite_demo.audio.hash | ||
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| mmc1_banked.audio.hash | ||
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| mmc3_per_state_split.audio.hash | ||
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| nested_structs.audio.hash | ||
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| noise_triangle_sfx.audio.hash | ||
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| palette_and_background.audio.hash | ||
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| platformer.audio.hash | ||
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| pong.audio.hash | ||
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| scanline_split.audio.hash | ||
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| sfx_pitch_envelope.audio.hash | ||
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| sha256.audio.hash | ||
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| sprite_flicker_demo.audio.hash | ||
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| sprites_and_palettes.audio.hash | ||
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| state_machine.audio.hash | ||
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| structs_enums_for.audio.hash | ||
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| two_player.audio.hash | ||
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| uxrom_banked.audio.hash | ||
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| uxrom_banked_to_banked.audio.hash | ||
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| uxrom_user_banked.audio.hash | ||
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| war.audio.hash | ||
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