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TODO_INVENTORY.md

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nes_rust TODO Inventory (vendored)

This inventory tracks TODOs in the vendored nes_rust snapshot.

src/lib.rs

  • L57: Audio buffer sample code T.B.D. (doc example). Likely remove or replace with note.

src/apu.rs

  • L53: sample_period timing fix needed for audio accuracy.
  • L67: APU reset behavior incomplete.
  • L79: Sampling timing not precise.
  • L93: Add note (DMC timer) — probably remove or add clarification.
  • L102: Frame sequencer timing not precise.
  • L168: IRQ timing needs verification.
  • L276: DMC CPU memory workaround is hacky; optional refactor.
  • L400/612/775/949: Invalid register write handling — probably ignore or document no-op.
  • L467: Sweep negation logic fix needed.
  • L975: Remove DMC memory workaround; optional refactor.

src/default_audio.rs

  • L29: Remove side effect in copy_sample_buffer (optional).
  • L31: Replace magic number 4096 with constant.

src/ppu.rs

  • L119: Data bus decay support (accuracy improvement).
  • L322: Greyscale support comment; likely redundant.
  • L495: Pixel alignment off-by-one investigation.
  • L594-L618: Missing cycle/subcycle fetch behavior.
  • L660: Attribute fetch correctness.
  • L690: Optional optimization.
  • L758-L759: MMC3 IRQ timing/placement.
  • L804/L830: Scroll updates conditional on rendering.
  • L863: Optional optimization.
  • L1020: Color emphasis implementation.
  • L1069: PPU master/slave select; likely ignorable on NES.

src/register.rs

  • L5: Combine Register/Register (optional refactor).

src/mapper.rs

  • L45: MMC3 IRQ hook in trait (optional architecture cleanup).
  • L149: MMC1 32KB banking fix needed.

src/cpu.rs

  • L44: Unknown button mapping; replace with unreachable or ignore.
  • L242: Opcode table refactor (optional).
  • L620: Page-cross cycle for ADC 0x71 needed.
  • L1254/L1258: DMC sample handling simplification + stall timing fix.
  • L1271: Frame update detection precision.
  • L1285: Poweroff input handling.
  • L1313: NMI vs IRQ ordering.
  • L1368/1895: Cleanup notes (optional).
  • L1417/1552/1557/1709/1716/1732/1738/1994: CPU logic correctness checks.
  • L1531/L2116: Invalid instruction/addressing mode handling.
  • L1909: DMA stall timing detail.
  • L1952: Interrupt handling optimization (optional).

src/rom.rs

  • L139: MMC3 IRQ in ROM (optional architecture cleanup).
  • L145: Cache header fields (optional).