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VideoBus

rustysnes_ppu::bus

Trait VideoBus 

Source 
pub trait VideoBus {
    // Provided methods
    fn cart_read(&mut self, _addr24: u32) -> u8 { ... }
    fn notify_scanline(&mut self) { ... }
    fn notify_vblank(&mut self) { ... }
}
Expand description

The narrow bus interface the PPU sees. Every method has a default so a minimal test impl (struct DummyBus; impl VideoBus for DummyBus {}) compiles.

Provided Methods§

Source

fn cart_read(&mut self, _addr24: u32) -> u8

Cartridge-mediated read for the PPU (Mode 7 extended-bank fetches on coprocessor boards route here; plain boards return open bus). Default 0.

Source

fn notify_scanline(&mut self)

Notify the board that the PPU is starting a new scanline (for scanline-aligned coprocessor / IRQ logic). Default no-op.

Source

fn notify_vblank(&mut self)

Notify the board that the PPU has entered vertical blank. Default no-op.

Implementors§