tag

#apu

3 posts

RetrogamingDeep Dive October 4, 2026 6 min read

Game Boy APU Frame Sequencer: Length, Sweep, and Envelope Timing

Model Game Boy APU frame-sequencer clocks, channel timers, sweep overflow, length counters, and envelope updates with hardware-aware tests.

#game-boy#audio#apu

RetrogamingDeep Dive October 4, 2026 8 min read

Model Game Boy channel 3 as a 32-nibble sequencer with model-specific wave RAM arbitration, DAC level, trigger state, and testable sample timing.

#game-boy#apu#wave-channel

RetrogamingDeep Dive October 3, 2026 8 min read

Trace NES DMC sample fetches, APU frame events, OAM-DMA contention, and controller-read glitches with cycle-aware emulator models and tests.

#nes#apu#dmc