These tests bruteforce Nintendo 64 PI DMA transfers with all kind of sizes and alignments to show all the weirdest behaviors.
The test verifies the output against golden files that were acquired on real hardware, so they are verified to be correct.
You can refer to this document for information on the findings: https://n64brew.dev/wiki/Peripheral_Interface#DMA_Transfers
Install libdragon following the official instructions, then just run:
$ make
This will build the test ROM (pi_dma_test.z64).
If you want to regenerate the golden files on real hardware, change
MODE_GENERATE to 1 at the top of pi_dma_test.c, and recompile. The generate
ROM will require a flashcart with a working SD card to save the golden
files on the SD. Libdragon supports multiple common flashcarts.