tag

#nintendo-ds

4 posts

RetrogamingDeep Dive October 4, 2026 7 min read

Nintendo DS 3D Geometry FIFO: Command Packing, GXSTAT, and the Geometry Pipe

Trace Nintendo DS geometry commands through packed FIFO writes, the internal pipe, GXSTAT, DMA thresholds, matrix state, and polygon completion.

#retrogaming#nintendo-ds#geometry

RetrogamingDeep Dive October 4, 2026 8 min read

Emulate the Nintendo DS RTC over serial GPIO, from command and bit edges to BCD time, status modes, alarms, and deterministic save-state tests.

#nintendo-ds#rtc#serial-io

RetrogamingDeep Dive October 4, 2026 8 min read

Separate Nintendo DS PCM channels from ARM7 sound FIFOs, then trace FIFO requests, capture routing, DMA writes, and audio-clock edge cases.

#nintendo-ds#audio#fifo

RetrogamingDeep Dive October 3, 2026 10 min read

Understand Nintendo DS ARM7/ARM9 IPCSYNC and FIFO registers, interrupt edges, backpressure, message framing, and emulator test cases.

#nintendo-ds#arm7#arm9