Saturating addition.

Number of primitives written this frame.

Write `prim` and return a mutable reference suitable for OT insertion. Returns `None` if the arena is full.

Saturating subtraction.

Clamp between two Q12 bounds.

Return the contained clip index, or `fallback` for the sentinel.

Add an arbitrary `u32` delta, wrapping on overflow.

Find the first-block directory index of `name`, if present.

Add a node under `parent`. Invalid parents fall back to the root.

Return `true` when a real local clip index is present.

Add another angle, wrapping on overflow (every operation on `Angle` wraps -- that's the whole point of a normalised representation).

Active scene, mutable.

Walls for one direction.

Active scene.

Get a node.

Draw `text` at screen-space `(x, y)` with the given tint. `(0x80, 0x80, 0x80)` = unmodulated white; any other value recolours every glyph via the PSX

Write a 32-bit little-endian word to a virtual address. - **RAM / scratchpad**: committed to the backing storage. - **BIOS ROM**: silently dropped (R

Feed one 32-bit word to the GP0 packet assembler. Public so DMA channel 2 can ship words through the same path CPU-direct writes take.

Number of response bytes captured.

Return `true` when this stores the sentinel value.

Write a 16-bit half-word to a virtual address. Same unmapped-region policy as [`Bus::write32`].

Prepend a primitive packet into the depth-`z` slot. `packet_ptr` must point at the packet's tag word (first `u32`); `words` is the count of data words

CTC2 view of control register `idx`.

All nodes in storage order.

`true` when `phys` falls inside `BASE..END`.

`true` when nothing is plugged in to either slot.

MTC2 view of data register `idx`.

Get a mutable node.

Width in grid sectors.

Add a resource and return its id.

Get a resource.

Convert a 24-bit RGB triple to PSX 15bpp BGR555. Bit 15 (the STP flag) stays 0; semitransparency hits later via the polygon translucency bit, not the

Set or replace a floor.

Allocated height in texels.

Get a `Ready` value, marking it most-recently-used. Returns `None` for an absent or still-`Loading` key.

Current root position.

Write a string to TTY. Each byte is emitted via the BIOS `putchar` trampoline.

Index into `[NW, NE, SE, SW]`.

Build a playtest package from `project`. Validates the scene tree, cooks every Room with non-empty geometry, resolves material textures through `proje

Accept a new 16-bit voice/main volume register value. bit15=0: fixed volume. Bits 0..14 are a signed 15-bit value representing Volume/2, so `current

Parse a raw PSX-EXE byte stream. The slice must contain the full header (2 KiB) plus at least `t_size` payload bytes.

Borrow the named Room's grid for the duration of `&self`, or `None` if the node isn't a Room. Avoids the `node.kind` matching dance at every cell-coor

Load a disc image. After this, GetID returns the licensed-disc response and ReadN streams real sector data through the DataReady event chain. Inserti

Cumulative cycles since reset.

Sine as a typed Q12 scalar.

Show `msg` in the status toast for the standard TTL. Used by action handlers to surface success / failure from the Menu without allocating a whole not

Return raw manifest storage.

Clock one byte across the serial link. Returns the device's RX byte and whether the device is holding `/DSR` low (ACK) to request another byte. The f

Floor `i` (0 = this base grid).

Squash a world-space i32 corner into the i16 the GTE V0 register expects. Subtracts the per-frame view anchor (= camera target) first so the emitted c

Expose the raw 16bpp words. The GPU rasterizer and VRAM viewer both read this directly.