2026-09-25 15:39:00

Signed-off-by: lizzie <lizzie@eden-emu.dev>
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lizzie
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# Design Overview
Modern game consoles require heavy power to be emulated appropriately. This is why the emulator uses an approach known as HLE (High-Level-Emulation), in a nutshell: Instead of accurately emulating every subsystem that forms part of a component, emulate the resulting visible I/O interface instead.
Modern game consoles require heavy power to emulate. This is why the emulator uses an approach known as HLE (High-Level-Emulation), in a nutshell: Instead of accurately emulating every subsystem that forms part of a component, emulate the resulting visible output of said interface instead.
For example, take a disk write, instead of emulating a proper SD card we instead use the C++ standard library for I/O. Additionally we use the abstractions provided by the `fs` service to "lie" to programs about certain SD card properties. Notably this includes making up sizes for the fake SD card, giving "realistic" values or expected outputs for a given card, and so on. And instead of writing to an actual SD card, the emulator simply writes to a file.