Subtract the contents of rs from zero, and store the result in rd.

Parse one cheat line `ADDRESS VALUE` (hex, separated by whitespace or `:`). The value's byte width is derived from its hex digit count and the bytes a

Send a command to patch all grass encounter entries in ROM.

Poll for events and update cached state.

Executes a PSR transfer instruction (MRS/MSR). # Panics Panics if R15 is used as source/destination register.

Executes a push/pop register instruction. # Panics Panics if address conversion fails.

Read a 16-bit opcode from memory, applying the `GamePak` prefetch buffer timing for sequential fetches.

Read a 32-bit opcode from memory, applying the `GamePak` prefetch buffer timing for sequential fetches.

Read a register value from user mode register bank Used for LDM/STM with S bit when R15 is not in register list

Re-detect the backup type from the ROM. Called after a save state load, where the ROM is restored separately and `backup_type` is not serialized.

Renders the hex dump view with header and all memory rows.

Renders a single memory row with hex bytes and ASCII representation.

Renders the navigation buttons for paging through memory.

Render a single pixel at the current scanline position. Composites all enabled layers, applies priority sorting and blending.

Renders the toolbar with region selector, address input, and refresh controls.

Resync the transient timer clock after loading a save state, so the first `step` does not advance the timers by the whole restored `cycles_count`. The

Run a ROM until it settles into the `b self` idle loop, then return r12. Returns `None` when the BIOS or the ROM is not available, so the caller can s

Attach the host audio sink so the DMA sound engine can emit samples at `output_rate` Hz.

Attach the host audio sink and set the output sample rate. Called once when the emulator is created with an audio device available.

Set button state: pressed = true, released = false. GBA uses active-low logic: bit 0 = pressed, bit 1 = released.

Enable instruction pushing while the window is open, disable it when closed, so the CPU hot path skips the per-instruction work otherwise.

Toggle freezing a slot's current HP to its max HP (no-faint cheat). The freeze re-applies every frame on the emulator thread.

TODO: remove cfg when this API will be used at least one in prod code.

Enable uncapped (maximum) speed.

Executes an SP-relative load/store instruction. # Panics Panics if address conversion fails.

Spawn the emulator thread and return a handle for communication. # Arguments `gba` - The GBA instance to run (ownership transferred to the thread) `d

Open the default output device and start playback. The device's sample rate is only known here, so the ring buffer is created through `make_consumer`

Advance the whole sound engine by `cycles` CPU cycles, emitting host samples as their period elapses.

Advance all PSG timers and the frame sequencer by `cycles` CPU cycles.

Detach the audio sink before a save state load, so it survives the CPU being replaced by the deserialized one.

Directory holding the jsmolka gba-tests checkout.