SourMesen/SnesTests

A collection of test roms for the SNES.

• op_timing_test: Validates the number of cycles taken by almost all instructions, using all combinations of the X/M flags.
• dma_irq_test: Validates the number of instructions that run after a manual DMA ($420B write) when an IRQ or NMI occurs during DMA.
• timing_test: WIP - general timing test that attempts to validate rough timings for DMA, HDMA and IRQ/NMIs.